PROGRAM EXECUTIVE OFFICE FOR UNDERSEA WARFARE

1.0 SCOPE 1

1.1 Identification 1

1.2 System Overview 1

1.3 Document Overview 1

2.0 APPLICABLE DOCUMENTS 2

2.1 Government Documents 2

2.1.1 NSSN Drawings 3

2.2 Order of Precedence 3

3.0 SYSTEM REQUIREMENTS 4

3.1 System Definition 4

3.1.1 LMRS UUV 4

3.1.2 LMRS Shipboard Deployed Equipment 4

3.1.3 Non-Deployed Shorebased Equipment 4

3.2 Characteristics 4

3.2.1 Performance Characteristics 5

3.2.1.1 Storage State 5

3.2.1.2 Shore Maintenance State 5

3.2.1.3 Ready for Fleet Issue State 6

3.2.1.4 Installation & Check-Out State 6

3.2.1.5 Pre-Launch State 7

3.2.1.6 Launch State 8

3.2.1.7 Mission Execution State 9

3.2.1.8 Rendezvous State 13

3.2.1.9 Recovery State 14

3.2.1.10 Post Sortie State 15

3.2.1.11 Off-Load State 15

3.2.2 External Interfaces 15

3.2.2.1 Range Tracking 15

3.2.2.2 Retrieval Craft Interface 16

3.2.3 Physical Characteristics 16

3.2.3.1 Protective Coatings 16

3.2.3.2 UUV Physical Characteristics 16

3.2.3.3 Shipboard Deployed Equipment 16

3.2.4 System Quality Factors 17

3.2.4.1 Reliability 18

3.2.4.2 Maintainability 18

3.2.4.3 System Sortie Launch Availability 19

3.2.5 Environmental Conditions 19

3.2.5.1 Shock Environment 19

3.2.5.2 Storage State Environment 21

3.2.5.3 Shore Maintenance State Environment 21

3.2.5.4 Ready for Fleet Issue (RFI) State Environment 21

3.2.5.5 Installation and Checkout State Environment 21

3.2.5.6 Pre-Launch State Environment 22

3.2.5.7 Launch State Environment 22

3.2.5.8 Mission Execution State Environment 22

3.2.5.9 Rendezvous State Environmental Conditions 22

3.2.5.10 Recovery State Environmental Conditions 22

3.2.5.11 Post Sortie State Environment 22

3.2.5.12 Off-Load State Environment 22

3.2.5.13 Environmental Conditions Cross Reference Table 27

3.2.6 Transportability 27

3.2.7 Portability 27

3.3 Design and Construction 28

3.3.1 Materials 28

3.3.1.1 Toxic Products and Formulations 28

3.3.1.2 Parts, Materials and Processes 28

3.3.2 Electromagnetic Radiation 28

3.3.3 Nameplate and Product Marking 28

3.3.4 Workmanship 28

3.3.5 Interchangeability 28

3.3.6 Safety 29

3.3.6.1 Operational Safety 29

3.3.6.2 Safety Status Monitoring 29

3.3.6.3 Depth Exclusion 29

3.3.6.4 Submarine Emergency Operations 29

3.3.6.5 Energy System 29

3.3.6.6 Electrical Safety 29

3.3.6.7 Implosion 29

3.3.6.8 Explosive Safety 30

3.3.6.9 SUBSAFE 30

3.3.6.10 Hazards of Electromagnetic Radiation to Ordnance 30

3.3.7 Human Engineering 30

3.3.8 Nuclear Control 30

3.3.9 System Security 30

3.3.10 Government-Furnished Property Usage 30

3.3.11 Computer Resource Reserve Capability 30

3.3.12 Environmental Protection 30

3.4 Deleted 30

3.5 Logistics 30

3.5.1 Maintenance 30

3.5.1.1 On-Board Maintenance 30

3.5.1.2 Shore Based Maintenance 31

3.5.2 Packaging, Storage, Handling and Transportation 31

3.5.3 Facilities 31

3.5.4 Support & Test Equipment 31

3.5.5 Standardization 31

3.6 Personnel & Training 31

3.6.1 Personnel 31

3.6.2 Training 31

3.7 Characteristics of Subordinate Elements 32

3.8 Precedence 32

4.0 QUALITY ASSURANCE PROVISIONS 33

4.1 Responsibility for Verification 33

4.2 Special Tests and Examinations 33

4.3 Requirements Cross Reference Table 33

5.0 PREPARATION FOR DELIVERY 37

5.1 Packaging 37

5.2 Marking 37

6.0 NOTES 38

6.1 Intended Use 38

6.1.1 Missions 38

6.1.2 Threat 38

6.2 Acronyms 38

6.3 Definitions 39

3.2.1-1 LMRS State Diagram 5

3.2.5-1 Deep Water Environment Sound Velocity Profile 24

3.2.5-2 Shallow Water Environment Sound Velocity Profile 26

3.2.3-1 SSN 688 and NSSN UUV Interface Parameters 16

3.2.3-2 NSSN / SSN 688 Preliminary Interface Dimensions 17

3.2.4.1-1 LMRS Reliability Requirements 18

3.2.4.2-1 LMRS Fault Localization Requirements (Ashore) 18

3.2.4.2-2 LMRS Fault Localization Requirements (Installed) 19

3.2.5-1 LMRS Environmental Conditions 21

3.2.5-2 Deep Water Environment 23

3.2.5-3 Deep Water Environment SVP Data 24

3.2.5-4 Shallow Water Environment 25

3.2.5-5 Shallow Water Environment SVP Data 26

3.2.5-6 Environmental Conditions Cross Reference 27

4.3-1 Requirements Cross Reference Table 33

PROGRAM EXECUTIVE OFFICE FOR UNDERSEA WARFARE

1.1 Identification. This specification establishes the performance, design, development, and verification requirements for the Long-Term Mine Reconnaissance System (LMRS).

1.2 System Overview. The mission of the LMRS is to provide the Ship, Submarine, Nuclear, Fast Attack (SSN) 688, 688I, and New Attack Submarine (NSSN) with an offboard capability to conduct clandestine minefield reconnaissance in support of submarine, battle group, and amphibious operations.

1.3 Document Overview. This system performance specification establishes the performance, system quality factors, design, development, and test requirements for the LMRS, including Unmanned Undersea Vehicle(s) (UUV(s)), Shipboard Deployed Equipment (SDE), and Non-Deployed Shorebased Equipment (NSE). The main body of this document is unclassified and references a separate Secret Appendix A.

2.1 Government Documents. The following specifications form a part of this document to the extent specified herein. Unless otherwise specified, the issues shall be the latest available at the time of contract award.

Indices

CNO Ltr Ser 87/6U660409 LMRS Classification Guidelines

of 7 Mar 96

OPNAVINST 3000.12 Operational Availability of Equipment and Weapon

NAVSEA Drawing Submarine SSN 688 Class Weapon Handling

H53711-5337121 and Stowage Mechanical Interfaces

NAVSEA S9070-AA-MME-010/ Guidance Manual for Temporary Submarine

SSN/SSBN Alterations

NAVSEA SW-395-AA-IFM Submarine Torpedo Tubes and Weapon Handling

010/SWIM-1 Systems Interface Manual Drawings (SSN 688)

NAVSEA SW-395-AA-IFM Submarine Torpedo Tubes and Weapon Handling

020/SWIM-2 Systems Interface Manual Drawings (SSN 688)

2.1.1 NSSN Drawings. NSSN drawings shall be considered preliminary, not all drawings exist. The drawing numbers and names cited herein were valid as of 4 February 1998. The anticipated release date of the NSSN drawings to the LMRS program is March 1998.

2.2 Order of Precedence. In the event of conflict between the text of this document and the references cited herein, the text of this document takes precedence. Nothing in this document, however, supersedes applicable laws and regulations unless a specific exemption has been obtained.

3.1 System Definition. The functions of the LMRS shall be allocated to UUV(s), SDE, and NSE. The UUV(s) and the SDE will be temporarily installed aboard a submarine for specific deployments as an OPALT/TEMPALT In Accordance With (IAW) NAVSEA S9070-AA-MME-010/SSN/SSBN and will be offloaded upon completion of that deployment. LMRS shall be initially designed to be installed as an OPALT/TEMPALT, however, at the Government’s discretion, selected portions of the OPALT/TEMPALT (e.g.: hooks, handles, foundations, and/or external SDE) may be converted to, and pre-installed as, a SHIPALT. The UUV(s) shall be stowed, and most of the SDE shall be installed, in the submarine's torpedo room and shall occupy weapons stows. LMRS shall make use of other SSN systems and equipment, e.g., weapon handling equipment, IAW the requirements of this specification.

The operational and logistics infrastructure for LMRS shall nominally consist of on-board maintenance and shore maintenance. On-board maintenance shall be minimized, but shall include actions necessary to maintain system reliability. Shore maintenance shall be conducted by the contractor at shore-based contractor or government facilities and shall include the majority of maintenance activities.

3.1.1 LMRS UUV. Each LMRS UUV shall be a reusable vehicle capable of being launched and recovered through the submarine's torpedo tubes. Each vehicle shall be autonomous, self-propelled, with navigation and control, communications, data processing, and obstacle avoidance capabilities IAW this specification. The UUV(s) shall support mine detection, localization, discrimination, and classification functions necessary to conduct the clandestine mine reconnaissance mission IAW the requirements described herein. Multiple UUVs may be deployed on the submarine.

3.1.2 LMRS Shipboard Deployed Equipment. The SDE shall consist of all of the OPALT/TEMPALT installed shipboard equipment, excluding the UUV(s) and other SSN systems. The SDE includes elements to support Launch & Recovery (L&R) of UUVs, ship interface, mission planning, mission execution, on-board training, on-board maintenance, and data collection, distribution, display, processing, and communication.

3.1.3 Non-Deployed Shorebased Equipment. The NSE shall consist of additional LMRS equipment required to support shore maintenance, training, preparation for deployment, installation, checkout, and transportation activities that are not required to support shipboard deployment requirements.

3.2 Characteristics. This section defines the characteristics of LMRS. Where parameters have been quantified, the value shall be considered the minimum acceptable, i.e., threshold, requirement unless stated otherwise. Where applicable, both a threshold and an objective have been quantified in the following manner: threshold #/objective #.

3.2.1 Performance Characteristics. LMRS shall be capable of performing in the states identified in Figure 3.2.1-1, consistent with the requirements stated below. All performance requirements apply to the system as a whole unless explicitly stated otherwise. These requirements shall be met during and after exposure to the environments described in section 3.2.5 and its subsections.

Since multiple UUVs may be deployed on the submarine, each UUV may be found in a different state at any given time. For example, one UUV may be in the Mission Execution state while a second UUV is in the Pre-Launch state, being readied to "relieve" the first UUV after it is recovered. Furthermore, each UUV may undergo multiple cycles through each of the states as necessary to complete the mission, as specified in section 3.2.1.7.

Figure 3.2.1-1 LMRS State Diagram

3.2.1.1 Storage. Storage shall be the state in which LMRS, assembled or disassembled, is placed between SSN deployments or tests. The UUV shall be in an unpowered, non-operational condition in this state. This state includes transportation and handling to and from the shore maintenance facility. LMRS shall be capable of remaining in this state for a period of at least 6 months before requiring additional maintenance.

3.2.1.2 Shore Maintenance. The Shore Maintenance state shall be the state in which the LMRS UUVs and SDE are prepared for the Storage or RFI states. Preparation may include packaging, unpacking, assembly, disassembly, replacement of consumables or expendables, repairs, and testing. The LMRS UUVs and SDE shall arrive in this state from the Storage, RFI, or Off-Load states. The Shore Maintenance state shall also be the state in which the NSE is operated, tested, maintained, and repaired.

In this state, the NSE shall be used for system and subsystem testing, troubleshooting, fault localization, and repairs. Repairs may include Preventive Maintenance (PM), Corrective Maintenance (CM), refurbishment, and replenishment activities. The NSE shall be used to prepare the UUVs and SDE for the RFI state. NSE shall be capable of generating operational (shipboard-like) signals to support testing performed in this state.

3.2.1.2.1 Shore Training Mode. All training, other than On-Board Training (see 3.2.1.5.1), shall occur in the Shore Maintenance state. The NSE, SDE, and UUV shall be designed to support shore training. This training capability shall support cadre and maintenance personnel training in the following: system preparation and checkout for RFI; system turnaround, troubleshooting, and maintenance; and system operation.

The system shall clearly display the training status while in the Shore Training mode.

3.2.1.3 Ready for Fleet Issue. RFI is an unpowered, non-operational state in which the LMRS UUVs, installation support equipment, and SDE, or constituent components, are fully ready for transportation to, and installation on, a submarine. This state shall begin at the shore based facility after successful completion of all functional tests and ends with LMRS (dockside) ready to begin the submarine Installation and Check-Out (I&CO) state. This state includes transportation and handling from the shore maintenance facility to the installation location. Including transportation, LMRS shall be capable of remaining in this state for a period of 60 days. LMRS subsystems and components shall be transported in a packaged condition IAW section 3.5.2.

3.2.1.4 Installation & Check-Out. I&CO shall be the state in which LMRS UUV(s) and SDE (or its constituent components) are transferred from the dock to the submarine, shipboard interfaces and connections are made, functional and diagnostic tests are performed, and all equipment is properly stowed. This state begins with the LMRS delivered to the installation site in the RFI state and ends with all LMRS components installed, checked-out, and stowed for entry into the Pre-Launch state.

The UUV(s) and SDE shall be installable as an OPALT/TEMPALT. The OPALT/TEMPALT shall conform to NAVSEA S9070-AA-MME-010/SSN/SSBN. As an objective requirement, the OPALT/TEMPALT shall not require the SSN to be dry-docked. Check-Out activities, including functional and diagnostic tests, shall be conducted using the SDE and NSE. At the completion of this state, the UUV(s) and the OPALT/TEMPALT installed SDE shall be securely stowed. The completion of this state shall require no more than 7 days/3 days. The SDE shall conform to the physical requirements of section 3.2.3 and the portability requirements of section 3.2.7.

3.2.1.4.1 POM Workup and CERT. Prior to any overseas movement, the SSN will conduct a Preparation for Overseas Movement (POM) workup and Certification (CERT). LMRS Installation and Checkout shall support both the POM CERT and subsequent overseas movement/mission. Specifically, the LMRS shall meet the physical requirements of section 3.2.3 with both CERT and mission assets aboard. The LMRS shall support a CERT of one 4.0 hour sortie, which includes launch, mission execution with communications/GPS, and recovery. LMRS shall be capable of supporting the subsequent overseas movement/mission without additional torpedo room load/unload operations.

3.2.1.5 Pre-Launch. The Pre-Launch state shall consist of all activities after I&CO and prior to the Launch state. Activities include: unpowered shipboard storage; on-board UUV and SDE maintenance; mission preparation and planning; vehicle turnaround and replenishment; and on-board training. LMRS shall enter the Pre-Launch state from the I&CO or Post Sortie states. LMRS shall be capable of remaining in this state for a total of 180 days.

The UUV(s) shall be stowed in the torpedo room, using existing weapon racks (and additional equipment) on the SSN 688/688I, and using existing weapons trays or LMRS carry-on trays on the NSSN. The UUV(s), and torpedo stow loaded SDE, shall be capable of being transferred, i.e. indexed, among stow positions. LMRS SDE, along with other SSN systems/equipment, shall support movement of SDE or UUV components as necessary. While stowed, the SDE and UUV(s) shall not interfere with the submarine's ability to conduct weapon operations and pre-planned maintenance. The LMRS shall not consume, or render inoperable, more than two torpedo tubes at any time in this state.

Mission Preparation and Planning (MP&P) shall be conducted in this state. Preparation shall include, but is not limited to: functional and diagnostic tests; replacement or replenishment of expendable and consumables; and activities necessary for launch.

The UUVs shall have the capability of being used for multiple sorties per deployment and shall only require the replenishment or recharging of consumables between sorties. Replenishment/recharging shall occur in the torpedo room. Energy system replenishment, if required between sorties, shall consist of electrical recharging (in hull) and/or replacement of the UUV energy hull section. If any UUV hull section is replaced while onboard the SSN, for energy replenishment or other reason, this shall be accomplished in a manner which does not vent any portion of the UUV internal atmosphere to the submarine which could potentially contain a hazardous substance and does not result in a hazard due to unconstrained masses within the torpedo room. UUV energy hull section teardown and turnaround, as appropriate, shall occur in the Shore Maintenance state.

Planning shall include, but is not limited to: development and validation of mission data files for use in the Mission Execution state; verification of system configuration to support the Mission Execution state; and downloading and verification of mission data files to the UUV.

Mission data files shall consist of software inputs, which are downloaded to the UUV, to provide any information required for the conduct of the sortie, but not provided for in the UUV embedded software or defaults: e.g., initial position; initial time; waypoints; ceiling; floor; initial run depth; rendezvous location; and sensor settings. Classified mission data files shall be controlled IAW section 3.3.9.

The SDE shall support: system functional testing and repairs; mission data file development, downloading to, and verification with, the UUV; and updating the mission data files. The UUV shall have the capability to perform critical ("Go - No Go") fault detection and report status to the SDE.

After the MP&P and UUV turnaround and replenishment are completed, the UUV shall be in a Mission Ready status. The Mission Ready status shall be maintainable, without further maintenance or replenishment, for a period of 24 hours.

Prior to Launch, the Mission Ready UUV is transferred into the torpedo tube, interfaces and connections are made, and the torpedo tube breech door is secured. When the UUV is loaded in the torpedo tube, the SDE and UUV shall have the capability to communicate with each other for status, fault monitoring and reporting, and for mission data file updating.

At all times in the Pre-Launch state, the UUV shall be capable of being safely returned to an unpowered stowage condition.

During this state, the LMRS shall provide for reliable jettison or retrieval of hardware (UUV and/or SDE) internal to the torpedo tube, launchway, or in any other location which would conflict with weapon launch, in 5 minutes or less, such that the muzzle door can be closed and the tube made ready for weapon launch.

3.2.1.5.1 On-Board Training Mode. The SDE and UUV shall be designed to support On-Board Training (OBT) in the Pre-Launch state. The OBT capability shall support ship’s force training and augment cadre training in the following areas: mission planning; presetting the UUV; assessing mission data; on-board maintenance; and rendezvous/recovery events. The OBT shall be capable of using synthesized data and simulation techniques. Training shall not require the actual launch and recovery of a UUV.

The system shall clearly display the training status while in the OBT mode. The system shall be designed to preclude the inadvertent start-up of the OBT mode during operational use of the LMRS.

3.2.1.6 Launch. The Launch state is defined to comprise the system functions required from the time the operator commands launch until time the UUV has entered the Mission Execution state. During this state, the torpedo tube is flooded and equalized and the UUV exits the torpedo tube. Upon completely exiting the tube the UUV shall safely transit to a position external to the submarine that shall have sufficient horizontal and vertical stand-off such that the UUV is clear of the submarine's hydrodynamic influence. The UUV shall be capable of being safely launched from the SSN without collision or other damage to the UUV or submarine, at ship speeds (through the water) up to 0.5 knots/3.0 knots in the forward direction while the ship maintains a nominal course and depth.

During this state, the LMRS shall provide for reliable jettison or retrieval of hardware (UUV and/or SDE) internal to the torpedo tube, launchway, or in any other location which would conflict with weapon launch, in 5 minutes or less, such that the muzzle door can be closed and the tube made ready for weapon launch. The LMRS shall not consume, or render inoperable, more than two torpedo tubes at any time in this state.

In this state, radiated noise shall not exceed the limits of section 10.2.2 of Appendix A.

The Launch state shall end when the UUV has left the torpedo tube and shutterway, separated from the launch and recovery portion of the SDE (if applicable), is underway on its own power, has achieved a vertical separation from the SSN of at least 20 feet, and has established a communications link with the submarine (see 3.2.1.6.2). The duration of this state shall be 30 minutes or less.

3.2.1.6.1 End-of-Run Function. During this state, and during the Mission Execution, Rendezvous, and Recovery states, the LMRS shall be capable of executing the End-of-Run (EOR) function. The EOR function shall be executed when commanded by an operator or automatically by the UUV after a programmable time of 1 to 100 hours after launch has elapsed.

The EOR function shall have two possible modes, the emergency recovery mode and the scuttle mode. The mode shall be selectable prior to launch and shall depend on whether the UUV is being used for a test/training/CERT mission or an actual mission.

If the emergency recovery mode is selected, the EOR function shall abort the mission and cause the UUV to safely shutdown and float to the surface. After floating to the surface, the UUV shall activate a strobe light (objective requirement), activate a radio beacon (objective requirement), and continue to operate the range tracking pinger (see section 3.2.2.1).

If the scuttle mode is selected, the EOR function shall cause the UUV to rapidly sink after rendering its mission critical parameters (presets), stored data, and classified software, in volatile memory, unrecoverable. Mission critical parameters shall be defined as any information that may expose or allow enemy insight or exploitation of: a) the past, current, or future operating location of the SSN; b) the location(s) of reconnaissance operations; or c) potential future military activities or intentions.

3.2.1.6.2 Communication. The short-range two-way communication requirement of 3.2.1.7.3 shall also be met in this state. The communication shall be of sufficient fidelity to handle status messages and mission update commands necessary to verify that the UUV is ready to proceed.

3.2.1.7 Mission Execution. The Mission Execution state shall consist of two phases: runout and area reconnaissance. This state shall commence when a UUV exits the Launch state. The runout phase shall consist of the UUV transiting through a series of waypoints to arrive at a waypoint which has been designated for the start of the reconnaissance. During the runout phase, the UUV shall only be required to operate sensors as needed for obstacle avoidance and navigation. During the area reconnaissance phase, the UUV shall perform the functions necessary to clandestinely reconnoiter a preprogrammed area, including detection, discrimination, localization, and classification. At all times during this state, the LMRS functions shall be done at a range sufficient to preclude activation of threat mines by the UUV (see section 3.2.1.7.5, 6.1.2, and Appendix A section 10.1).

While a UUV can only be in one state at any time, the system shall be capable of supporting operations in multiple states to allow the reconnaissance area to be sequentially reconnoitered by multiple sorties to meet the Total Area Coverage (TAC) and Area Coverage Rate (ACR) requirements specified below.

Should multiple UUVs be deployed, the system shall be capable of simultaneously supporting one UUV in the Pre-Launch, Launch, Rendezvous, Recovery, or Post Sortie state and one in the Mission Execution state. The system is also required to support two UUVs in the Mission Execution state at a time; however, when this capability is used, it will be the system operator’s tactical responsibility to select search areas far enough apart to preclude interference between UUVs and to coordinate launch, recovery, and communication functions and/or timing to avoid interference.

The LMRS shall provide a Total Area Coverage (TAC) over the system’s mission cycle of 400 nautical miles squared (nm²)/650 nm². TAC is defined as the summation of area reconnoitered by six individual sorties, not including any coverage overlaps, while satisfying the mine detection, localization, and discrimination requirements of section 3.2.1.7.1.

The Area Coverage Rate (ACR) shall be a minimum of 35 nm² per day/50 nm² per day. ACR is defined as the TAC divided by the fractional number of days (duration in hours divided by 24 hours) required to complete the system’s mission cycle. The system’s mission cycle is defined as the period of time from the start of the first Launch State to the end of the last Recovery State, including downtime between sorties.

Each UUV shall have an endurance of at least 40 hours/62 hours at 4 knots through the water. Each UUV shall provide a Vehicle Sortie Reach (VSR), defined as the maximum radial distance the UUV can travel from the start of the area reconnaissance phase of the Mission Execution State and return to the same point at the end of the area reconnaissance phase of the Mission Execution State, of 75 nautical miles (nm)/120 nm.

The LMRS UUV shall autonomously detect, discriminate, and select targets for classification and shall autonomously execute, as required, vehicle maneuvers to safely and efficiently perform the classification function. The TAC, ACR, UUV endurance, and VSR requirements shall be met at 4 knots (through the water), with mine search operations 100% of the time in the area reconnaissance phase, with mine classification operations 15% of the time in the area reconnaissance phase, when the Mission Execution State runout phase and the Rendezvous State (see section 3.2.1.8) both consist of a 5 nm transit, and with a 10% energy reserve in the UUV after each recovery.

During the area reconnaissance phase of the Mission Execution state, the UUV shall autonomously process and store UUV and UUV sensor data for later use by the submarine. The Sortie Data Set (SDS) is defined as the aggregate set of data collected by the UUV during that particular sortie’s Mission Execution state. The LMRS UUV shall process the SDS as necessary to generate and continuously update a Sortie Summary File (SSF). The SSF shall include the vehicle track, vehicle status, and location and characteristics of the mine like targets (see 3.2.1.7.1) encountered. As a minimum, the SDS shall include all of the SSF information plus sufficient raw or processed sensor data to create classification displays/images for each mine like target classified and detection sensor display/images for each volume object discriminated as an MLO (see section 3.2.1.7.1 and 3.2.1.7.2). As a goal, the SDS shall include the aforementioned information for all the mine like targets encountered. The LMRS UUV recording capacity shall be consistent with the SDS recording requirements for the environments (target and MLO density) defined in section 3.2.5.8, regardless of what percent of the mission time is spent for detection/classification. The autonomous processing, storage, selection, maneuvers, and generation of the SDS and SSF shall be organic to the vehicle.

Upon periodic receipt of the SSF updates (from the UUV) on the submarine (see 3.2.1.7.3), the LMRS SDE shall integrate the SSF information with the information sent previously in that particular sortie, and with the information developed in the previous Post Sortie states (see 3.2.1.10).

During this state, the LMRS shall provide for reliable jettison or retrieval of the SDE hardware internal to the torpedo tube, launchway, or in any other location which would conflict with weapon launch, in 5 minutes or less, such that the muzzle door can be closed and the tube made ready for weapon launch. The LMRS shall not consume, or render inoperable, more than two torpedo tubes at any time in this state.

The Mission Execution state is concluded when the UUV enters the Rendezvous state, based on the pre-loaded mission data files, as commanded by an operator, or as a result of a sortie critical fault.

3.2.1.7.1 Detection, Localization, and Discrimination. Detection shall be the sequence of events by which the system indicates the presence of target(s). Discrimination shall be the process of determining whether a detected target exhibits characteristics of a Mine Like Object (MLO). Discriminated targets (mine like targets) exhibit target strength and extent comparable to threat mines, as defined in section 6.1.2 and Appendix A section 10.1, and are stationary with respect to the bottom. Discrimination shall include information/indicators relating to the vertical position of the target in the water column. Discriminated targets clearly in the volume shall be designated MLOs and do not require classification whereas bottom or near bottom objects may require classification (see section 3.2.1.7.2).

Localization of a discriminated target shall be the estimation of the target’s geodetic location (e.g. Latitude and Longitude). Localization of a mine like target shall be sufficient to provide a geodetic Mine Positioning Accuracy (MPA) of 78 yards Circular Error Probable (CEP) for each target and provide a relative UUV to target position accuracy to allow the UUV to execute a classification maneuver (see section 3.2.1.7.2). In addition, the forward field of view of the search sensor shall be sufficient to support obstacle avoidance. The forward field of view, autonomous processing, and UUV dynamics shall be such that the Closest Point of Approach (CPA) to a target shall be 20 yards (see sections 3.2.1.7.2 and 3.2.1.7.5).

The search sensor performance shall be configurable for the best performance over the range of environments specified in section 3.2.5.8. The search sensor detection performance shall be sufficient to provide a swath width, in both of the typical environments of 3.2.5.8, which is sufficient to meet the TAC and ACR requirements of 3.2.1.7. At the maximum range associated with these swath widths, the probability of detection (Pd), for targets consistent with the threat mines, as defined in section 6.1.2 and Appendix A section 10.1, shall be 0.85. The designed false alarm rate shall be 1x10^-5; false alarms shall apply to the detection function and are defined as indications of a target in the case when there is not a target present.

3.2.1.7.2 Classification. Classification is the determination that a bottom/near-bottom target is, or is not, a MLO. MLOs are either mines (see section 6.1.2 and Appendix A section 10.1) or Non-Mine Bottom Objects (NOMBOs). MLOs have target strength, physical dimensions, and shape consistent with mines (see section 6.1.2 and Appendix A section 10.1).

The LMRS classification sensor shall have a resolution sufficient to differentiate between proud mines and the ocean floor. Classification shall be done at a range sufficient to preclude activation of threat mines by the UUV (see section 3.2.1.7.5 and Appendix A section 10.1).

Selection of targets for classification and the execution of classification maneuvers shall be autonomous and organic to the LMRS UUV. The following classification metrics apply to the system and are measured after applicable post-sortie processing and analysis (see 3.2.1.10). LMRS shall have a Probability of Correct Classification (Pcc) of 0.9. Pcc shall be defined as the probability that an MLO is classified as an MLO. LMRS shall have a Probability of Correct Dismissal (Pcd) of 0.9. Pcd shall be defined as the probability that a non-MLO is classified as a non-MLO.

3.2.1.7.3 Vehicle-Submarine Communications Performance Characteristics. While in the Mission Execution state, LMRS shall have the capability of short-range, submerged, Low Probability of Intercept (LPI), two-way communications between the vehicle and the submarine, out to a range of 1000 yards/1500 yards, which is sufficient to support transmission of operator commands, vehicle status, and navigation data. If acoustic communications are used, acoustic frequencies shall be selected to eliminate potential interference with active SSN sensors and weapons. Interference with SSN passive systems shall be minimal.

The LMRS UUV shall be capable of pre-scheduled, two way, full or half duplex, long-range communication with the submarine (directly or indirectly) sufficient to support periodic transmission of the SSF (or the latest update to the SSF) and periodic mission updates from the submarine. The long-range communication function shall provide for direct or indirect (e.g. via a satellite) communication out to the maximum VSR range.

If Radio Frequency (RF) communications are used, the TAC, ACR and VSR metrics of 3.2.1.7 shall be met when the communication interval is consistent with the Fix Reset Interval (FRI) requirement of 3.2.1.7.4. Additionally, the duration of RF communications shall be 10 minutes/5 minutes for each communication interval, when the communications update interval coincides with the FRI.

3.2.1.7.4 Navigation Performance Characteristics. The UUV shall be capable of navigating consistent with the requirements of the Rendezvous state. The UUV shall be capable of navigating on a programmed course or by waypoints. Geodetic positioning errors shall be sufficiently low to meet the MPA requirements of section 3.2.1.7.1, and to permit relocation of the terminus of any prior LMRS reconnaissance sortie within a single pass. The UUV is permitted to periodically stop the reconnaissance and obtain position resets (e.g., via the Global Positioning System (GPS)), provided that the TAC, ACR, and VSR requirements of section 3.2.1.7 are still met. The UUV shall possess relative navigation accuracy sufficient to resume reconnaissance without holidays in coverage following the position reset. The position Fix Reset Interval (FRI) shall be at least 9 hours/12 hours.

3.2.1.7.5 Vehicle Performance Characteristics. The UUV shall have a self contained propulsion subsystem sufficient to meet the endurance requirements of section 3.2.1.7. Each UUV shall have a continuous speed capability sufficient to maintain the ACR requirement of 3.2.1.7 against the worst case adverse current of 3.2.5.8. The UUV shall provide a stable platform commensurate with the requirements of the detection and classification sensors under the nominal environmental conditions of section 3.2.5.8. The UUV shall autonomously maneuver as necessary to meet sensor positioning requirements.

During the runout phase of this state, far field, radiated noise of the UUV shall not exceed the limits specified in Appendix A section 10.2.1. During the mine reconnaissance phase of this state, the total LMRS UUV signature (acoustic, electric, magnetic, pressure, or galvanic) shall be such that the UUV can approach a threat mine, as defined in section 6.1.2 and Appendix A section 10.1, with a two dimensional (plan view, i.e. vertical, cylindrical keep out zone) Closest Point of Approach (CPA) of 20 yards, without causing the mine to detonate. At all times during this state, UUV self noise, at any speed up to the top speed of the UUV, shall be at a level which allows nominal operation of all acoustic sensors.

UUV maximum operating depth shall be 1000 feet/1500 feet.

3.2.1.8 Rendezvous. Rendezvous shall be the state in which the UUV concludes its Mission Execution activities and returns to a geodetic location, via a series of waypoints, in preparation for UUV recovery. The UUV shall enter the Rendezvous state: based upon a planned conclusion of the previous state, as stored in the mission data files; or upon command from the submarine via the long-range communications link; or if the UUV detects a fault which makes continuing the Mission Execution state ineffective. The location for rendezvous shall be stored in the mission data files. During the Rendezvous state, the UUV shall only be required to operate sensors as needed for obstacle avoidance, and navigation. During this state, the LMRS shall provide for reliable jettison or retrieval of hardware internal to the torpedo tube, launchway, or in any other location which would conflict with weapon launch, in 5 minutes or less, such that the muzzle door can be closed and the tube made ready for weapon launch. In this state, far field, radiated noise of the UUV shall not exceed the limits specified in Appendix A section 10.2.1. The LMRS shall not consume, or render inoperable, more than two torpedo tubes at any time in this state. The Rendezvous state ends when the SSN is satisfied that the UUV is safe to recover and commands entry into the Recovery state.

3.2.1.8.1 Navigation and Transit to Rendezvous. Upon entering the Rendezvous state, the LMRS UUV shall autonomously transit to the rendezvous location. The UUV shall reach the rendezvous location within a position error of 300 yards CEP or less. The UUV shall arrive at the rendezvous location with a depth error of no more than 10 feet.

3.2.1.8.2 Communication. The short-range two-way communication requirement of 3.2.1.7.3 shall also be met in this state. The communication shall be of sufficient fidelity to handle all rendezvous and subsequent recovery commands in a timely fashion and to periodically update the UUV status to the submarine.

3.2.1.9 Recovery. The Recovery state shall include all actions which cause the UUV to move from the rendezvous position to a position inside the torpedo room. This state shall consist of four phases, a Homing and Docking (H&D) phase, a Towing phase, a Retrieval phase, and a Backhaul phase.

During this state, the LMRS shall provide for reliable jettison or retrieval of hardware (UUV and/or SDE) internal to the torpedo tube, launchway, or in any other location which would conflict with weapon launch, in 5 minutes or less, such that the muzzle door can be closed and the tube made ready for weapon launch. The LMRS shall not consume, or render inoperable, more than two torpedo tubes at any time in this state.

In this state, the far field, radiated noise of the LMRS (UUV plus SDE) shall not exceed the limits specified in Appendix A section 10.2.2.

The combined duration of the H&D and Retrieval phases of the Recovery State shall be 30 minutes or less. Recovery shall occur in the environments specified in section 3.2.5.10.

For the purpose of calculation of the ACR requirement of section 3.2.1.7, a duration of 5 minutes for the Towing phase and 15 minutes for the Backhaul phase shall be assumed.

3.2.1.9.1 H&D Phase. In the H&D phase, after being commanded to initiate recovery, the UUV shall autonomously transit from the rendezvous location and mechanically dock with the recovery portion of the SDE, while avoiding collision with the submarine.

3.2.1.9.2 Towing Phase. In the Towing phase, the UUV shall remain physically docked with the recovery portion of the SDE. Minimum towing speed shall be 3 knots/7 knots, forward through the water. Towing duration shall be selected by the system operator and will be consistent with the remaining UUV energy.

3.2.1.9.3 Retrieval Phase. The Retrieval phase shall start when commanded by an operator. When commanded, the recovery SDE shall cause the attached UUV to be safely moved into the torpedo tube, while avoiding damage to the UUV and submarine. The LMRS shall be capable of safely executing the Retrieval phase while the submarine maintains a nominal course and depth at ship speeds, forward through the water, of not less than 0.5 knots/3.0 knots.

The Retrieval phase shall end when the muzzle and shutter doors are closed and, after the UUV is determined to be in a safe condition, the tube is drained.

3.2.1.9.4 Backhaul Phase. During the Backhaul Phase, the UUV, having been determined to be in a safe condition, is returned to the torpedo room.

The Backhaul Phase, and the Recovery state, end when the UUV and applicable portions of the SDE are securely stowed in the torpedo room.

3.2.1.9.5 Communication. During the H&D and Towing phases, the short-range communication requirements of section 3.2.1.7.3 shall apply. During the Retrieval and Backhaul phases, if the aforementioned communication is not available, another method shall exist which enables the ship's force/cadre to assess the safety of recovering the UUV IAW section 3.3.6.2.

3.2.1.10 Post Sortie. The Post Sortie state shall begin at the conclusion of the Recovery State. Post Sortie shall be the state in which a UUV is prepared for the Pre-Launch state and in which UUV and SDE recorded data shall be post-processed, displayed, and analyzed. Preparations for the Pre-Launch state shall include, but are not limited to, inspection of the UUV, extraction and analysis of the SDS, and diagnostic tests.

Post-processing, display, and analysis shall be accomplished in this state. Quick look information, as a minimum the last version of the SSF, shall be available within 30 minutes/20 minutes after entering the Post Sortie state.

In this state, the LMRS shall integrate the SSF and the SDS into the Reconnaissance Summary File (RSF) and Reconnaissance Data Set (RDS). The RSF and RDS combine the information from the individual sortie with the information generated in previous sorties.

The RSF shall be compatible with the submarine's existing communication links. Completion of the required post-processing, analysis, and display for an individual sortie, and completion of the update to the RDS and RSF, shall occur within 48 hours/24 hours after the start of this state for that sortie.

3.2.1.11 Off-Load. Off-Load shall be the state in which LMRS or LMRS components are removed from the submarine and transported to the shore maintenance facility. A complete LMRS Off-Load shall include: disconnection of all TEMPALT installed components; off-loading SDE and UUV(s); and restoration of the submarine to pre-I&CO configuration and function. The duration of a complete LMRS Off-Load shall require less than 48 hours. The system shall conform to the portability requirements in section 3.2.7.

3.2.2 External Interfaces. In addition to the operational interfaces described in this specification, LMRS shall be compatible with US Navy underwater ranges which will be used during training and testing. The principle underwater ranges are: Naval Undersea Warfare Center Division Keyport ranges; Atlantic Undersea Test and Evaluation Center (AUTEC) range; Pacific Missile Range Facility (PMRF) ranges; Atlantic Fleet Weapons Training Facilities (AFWTF); and the Southern California Operation Range Expansion (SCORE).

3.2.2.1 Range Tracking. LMRS shall provide a pinger capability to allow acoustic tracking of the UUV (in the exercise and test configurations only) on the underwater ranges during exercise runs. The LMRS pinger capability shall be fully compatible with, and functionally equivalent to, existing Navy range capabilities. The current underwater tracking pingers are:

a. MK 84 Sonar Transmitter

b. Keyport Range Tracking Pinger

3.2.2.2 Retrieval Craft Interface. The LMRS UUV shall be capable of being retrieved, after the execution of the surface mode of the EOR function, by existing Navy range support craft with minimal modification.

3.2.3 Physical Characteristics. The LMRS OPALT/TEMPALT shall consume no more than 10 stows in the torpedo room; this number includes stows which must be left empty to support UUV/weapon movement within the torpedo room. All LMRS OPALT/TEMPALT installed equipment shall have mechanical hard-points, or other restraints, which do not interfere with the submarine's weapon loading/handling equipment (indexing and tube loading of weapons), and are sufficient to restrain the equipment during the environments defined in section 3.2.5. At all times during the submarine deployment with LMRS, a minimum of two torpedo tubes shall remain available for weapon operation.

The total weight of the LMRS OPALT/TEMPALT installed components, including UUVs shall be less than or equal to 4000 lb. times the number of stows consumed in the torpedo room. The maximum mass allowed in any one stow is 4600 lb.

The UUV, and any attached or tube loaded SDE, shall withstand full impulse launch during emergency jettison. Peak axial acceleration during full impulse launch will be between 3 and 10g, with an exit velocity of between 12 and 24 m/s.

3.2.3.1 Protective Coatings. LMRS shall be protected from corrosion, electrolysis, abrasion, or other deleterious action.

3.2.3.2 UUV Physical Characteristics. The UUV and tube loaded SDE shall be compatible with both the SSN 688/688I and NSSN torpedo tubes (Mk 67 in SSN 688/688I and Mk XX in NSSN). The vehicle and tube-loaded equipment shall: have a maximum diameter of 20.95 inches (0.5321 meters), not including alignment and locating components; be contained within a true right cylindrical envelope of 21.010 inches (0.5336 meters), not including alignment and locating components; and have an in-tube length consistent with the maximum limits specified in Table 3.2.3-1.

Table 3.2.3-1 SSN 688 and NSSN UUV Interface Parameters

3.2.3.3 Shipboard Deployed Equipment. LMRS shall not require an increase in capacity of, or interfere with, existing submarine electrical, hydraulic, or pneumatic systems. The SDE interfaces to the submarine shall be designed to preclude disruption of normal ship's functions and operation. The SDE and its interfaces to the submarine shall meet the requirements of NAVSEA S9070-AA-MME-010/SSN/SSBN. The LMRS SDE shall be designed for a maximum degree of commonality between SSN 688, 688I, and NSSN versions.

3.2.3.3.1 NSSN / SSN 688 Interface Preliminary Dimensions. Preliminary NSSN dimensions, which are subject to change, are provided in Table 3.2.3-2 and are compared with the nominal equivalent dimension on the SSN 688.

Table 3.2.3-2 NSSN / SSN 688 Interface Preliminary Dimensions.

3.2.3.3.2 Command and Control Physical Characteristics. The command and control portion of the SDE shall be designed to be accessible for on-board maintenance and repair and shall be designed IAW section 3.3.7 to provide an effective and efficient transfer of information to and from the operators. System critical equipment may be connected to the ship's vital bus.

3.2.4 System Quality Factors. Reliability, Maintainability, and Availability (RM&A) terms used throughout section 3.2.4 are as defined herein, and in OPNAVINST 3000.12.

The requirements specified in this section apply during and after exposure to the combination of packaging, handling, storage, transportation, and operational environments specified in section 3.2.5 and consistent with this specification and the intended use of LMRS.

3.2.4.1 Reliability. Reliability requirements are specified herein for the system (product of UUV and SDE reliabilities). Two system reliability requirements are quantified: System Mission Reliability and System Sortie Reliability. The reliability requirements shall be IAW table 3.2.4.1-1.

Table 3.2.4.1-1 LMRS Reliability Requirements

3.2.4.1.1 System Mission Reliability. System Mission reliability is defined as the measurement of the probability that the complete LMRS mission, consisting of the execution of all states from the start of the first mission preparation in the Pre-Launch state for the first sortie to the conclusion of the last Post-Mission state after the last sortie, for a threshold TAC mission (400 sq. nm), is successfully completed without a mission critical fault, i.e., without a mission abort.

3.2.4.1.2 System Sortie Reliability. System Sortie reliability is defined as the measurement of the probability that an individual LMRS sortie, consisting of a complete cycle of preparation, launch, threshold endurance mission execution (40 hr), recovery, and post-mission activities, is successfully completed without a sortie critical fault, i.e., without a sortie abort.

3.2.4.2 Maintainability. Maintainability of the UUV and SDE shall be structured in a way to facilitate ease of removal and replacement of failed modules and shall minimize the need for checkout, calibration, servicing, and preventive maintenance tasks. The LMRS design shall minimize the need for special tools for maintenance or repair. Performance Monitoring (PM), defined as the probability that the system correctly detects a mission critical fault, shall be 0.95/0.97. System Fault Localization (FL) requirements vary as a function of state and are described in the following sections.

3.2.4.2.1 Fault Localization Ashore. FL for the Shore Maintenance state shall be IAW table 3.2.4.2-1. FL shall be defined in terms of the percentage of the time that the LMRS correctly isolates a mission critical fault to the correct Lowest Replaceable/Repairable Unit (LRU) or to the correct Computer Software Unit (CSU). System FL requirements are decomposed into UUV, SDE, and NSE herein; when the system is in the Shore Maintenance State, the NSE may be used to assist the UUV/SDE in meeting the requirements of table 3.2.4.2-1.

Table 3.2.4.2-1 LMRS FL Requirements (Ashore)

3.2.4.2.2 Fault Localization Onboard. FL for the I&CO through the Post-Sortie states shall be IAW table 3.2.4.2-2. FL shall be defined in terms of the percentage of the time that the LMRS correctly isolates a mission critical fault to the correct Basic Replaceable Unit (BRU) or to the correct Computer Software Unit (CSU). System FL requirements are decomposed into UUV and SDE herein; when the system is on board the SSN, the SDE may be used to assist the UUV in meeting the requirements of table 3.2.4.2-2.

Table 3.2.4.2-2 LMRS FL Requirements (Installed)

3.2.5 Environmental Conditions. This section, and the tables herein, specify the range of environmental conditions to which the LMRS shall comply as a function of state. The varied environmental conditions are summarized in Table 3.2.5-1.

The environmental conditions for the inboard portions of the SDE do not vary with state once the system has been installed onboard the submarine and shall be represented by section 3.2.5.6, Pre-Launch state. Paragraphs 3.2.5.6 (Pre-Launch) through 3.2.5.11 (Post-Sortie) indicate the changes in environments as a function of state which shall apply to the UUV and external, wet or tube loaded, SDE equipment. A cross reference table is provided in section 3.2.5.13 to summarize the relationship of system states and Table 3.2.5-1 environments.

LMRS shall withstand inclinations (measured from the vertical) of up to 45 degrees, but is not required to be fully functional during such events. Inclination angle may exceed 45 degrees during the I&CO state.

3.2.5.1 Shock Environment. The LMRS shock and acceleration environment shall include shock due to transportation, rough handling, normal system operation, and underwater explosions (shipboard shock). Shock requirements due to transportation shall apply to all parts of LMRS. Shipboard shock requirements shall apply to UUVs and SDE. Shock values specified herein shall apply to the carrier (e.g. shipping container, weapon stowage racks, weapon tray supports, or equipment foundation/mount). The shock requirements are subdivided in the following sections: shocks for which the component must remain safe and operational (submarine critical components) and shocks for which the component must remain safe but is permitted to be non-operational after shock (non-submarine critical components). The shock environment falls into two distinct categories defined as High Impact (H.I.) shock governed by MIL-S-901, and Underwater Explosive (UNDEX) shock governed by the applicable specification for qualification of submarine hull penetrations.

3.2.5.1.1 Submarine Critical Shock Environment. Submarine critical portions of LMRS shall include: modification to a SUBSAFE boundary; modification or replacement of components used for weapon launch; and any component whose failure could result in a Category I or II hazard for submarine personnel (see 3.3.6).

For SSN688/688I, LMRS modifications to a SUBSAFE boundary shall undergo UNDEX testing and shall meet the Grade A requirements as defined by NAVSEA 0902-018-2010, Section 9400-2. For NSSN, LMRS modifications to a SUBSAFE boundary shall undergo UNDEX testing and shall meet the Grade A requirements as defined by PPD 802-6337445. For both classes, other submarine critical portions of LMRS shall meet the shipboard shock requirements of MIL-S-901 at the Grade A level.

The UUV and tube loaded equipment shall withstand unregulated flooding of the submarine torpedo tube at test depth. The UUV shall withstand impact with recovery systems.

3.2.5.1.2 Non-Submarine Critical Shock Environment. The non-submarine critical portions of UUVs, and non-submarine critical portions of the SDE shall meet the shipboard shock requirements of MIL-S-901 at the Grade B level. The UUVs, and portions of the SDE, which could interfere with weapon launch, shall meet the requirement of this section and be retrievable or jettisonable in 5 minutes or less.

Table 3.2.5-1. LMRS Environmental Conditions

3.2.5.2 Storage State Environment. The Storage state environment shall be IAW the Shore requirements of Table 3.2.5-1.

3.2.5.3 Shore Maintenance State Environment. The Shore Maintenance state environments shall be IAW the Shore, Controlled requirements of Table 3.2.5-1.

3.2.5.4 Ready for Fleet Issue (RFI) State Environment. The RFI state environment shall be IAW all Transportation and Shore requirements of Table 3.2.5-1.

3.2.5.5 Installation and Checkout State Environment. The Installation and Checkout state environment shall be IAW the Shore, Uncontrolled, and Submarine Deployed requirements of Table 3.2.5-1.

3.2.5.6 Pre-Launch State Environment. The Pre-Launch state environment shall be IAW the Submarine Deployed requirements of Table 3.2.5-1. The temperature and humidity extremes of Table 3.2.5-1 do occur, but would generally occur when LMRS was not operating and are transient events. Nominal submarine deployed conditions are 59 to 95 ° F, or 15 to 35 C, non condensing. The Pre-Launch state environment for the UUV includes the transition from the torpedo room into the torpedo tube.

3.2.5.7 Launch State Environment. The Launch state environment shall be IAW the Launch and Recovery requirements of Table 3.2.5-1. The minimum submarine keel depth will be 120 feet/65 feet (periscope depth). Submarine motion will be a function of the actual keel depth, but will be no more severe than the motion at 120 feet when the surface conditions are sea state 2. Although no operational requirement exists for launch from a surfaced SSN, if the system’s design permits, initial testing, checkout, and training may occur with the SSN dockside, at near sea state zero.

3.2.5.8 Mission Execution State Environment. The Mission Execution state environment shall be IAW the In-Water requirements of Table 3.2.5-1, IAW the deep and shallow environments of Tables 3.2.5-2, 3.2.5-3, 3.2.5-4, and 3.2.5-5, and IAW the deep and shallow Sound Velocity Profiles (SVPs) of Figures 3.2.5-1 and 3.2.5-2. The Mission Execution state environment shall include up to 32 Non-Mine Bottom Objects (NOMBOs) and 200 sonar targets (non-MLOs) per square nautical mile.

3.2.5.9 Rendezvous State Environmental Conditions. The Rendezvous state environmental conditions shall be IAW the In-Water requirements of Table 3.2.5-1.

3.2.5.10 Recovery State Environmental Conditions. The Recovery state environmental conditions shall be IAW the Launch and Recovery requirements of Table 3.2.5-1. The minimum submarine keel depth will be 120 feet/65 feet (periscope depth). Submarine motion will be a function of the actual keel depth, but will be no more severe than the motion at 120 feet when the surface conditions are sea state 2. Although no operational requirement exists for recovery from a surfaced SSN, if the system’s design permits, initial testing, checkout, and training may occur with the SSN dockside, at near sea state zero.

3.2.5.11 Post Sortie State Environment. The Post Sortie state environment shall be IAW the Submarine Deployed requirements of Table 3.2.5-1. The temperature and humidity extremes of Table 3.2.5-1 do occur, but would generally occur when LMRS was not operating and are transient events. Nominal submarine deployed conditions are 59 to 95 ° F, or 15 to 35 C, non- condensing.

3.2.5.12 Off-Load State Environment. The Off-Load state environment shall be IAW the Submarine Deployed and Shore, Uncontrolled requirements of Table 3.2.5-1.

Table 3.2.5-2. Deep Water Environment

* World Meteorological Organization (WMO) Code (APL-UW TR-8907).

** APL-UW High Frequency Ocean Environment Acoustic Models TR-9407.

Figure 3.2.5-1 Deep Water Environment Sound Velocity Profile.

Table 3.2.5-3 Deep Water SVP Data

Table 3.2.5-4. Shallow Water Environment