SUPPLEMENTAL INSTRUCTION 3110.10
COMMAND, CONTROL, COMMUNICATIONS, AND COMPUTER SYSTEMS
1. PURPOSE. This supplemental instruction gives information and guidance to combatant commanders on joint command, control, and communications support, responsibilities, and procedures.
a. The required communications capability will come from the Defense Communications System (DCS), other National Communications System operating agency systems, or other DOD communications systems (tactical and special purpose). Regardless of the source, communications personnel furnished to a commander will be under his operational control and will be an integral part of his command and control system.
b. It is imperative that communications and ADP systems be compatible with and make maximum use of the Worldwide Military Command and Control System (WWMCCS).
c. The Joint Staff, through the combatant commands, the Defense Information Systems Agency (DISA), and the military Services, will ensure that the commander at each echelon has the communications necessary to accomplish the assigned mission.
3. COMMUNICATIONS SYSTEMS
a. National Communications System (NCS)
(1) NCS encompasses the DCS and selected communications assets of the Department of State, Federal Aviation Administration, National Aeronautics and Space Administration, General Services Administration, Departments of Commerce and Interior, Federal Communications Commission, US Information Agency, and Department of Energy.
(2) The objective of the NCS is to ensure that the important federal telecommunications resources are so interlinked that the aggregate will function as a single system.
(3) The Secretary of Defense is the executive agent for the NCS and the Director, DISA, is the manager, NCS.
b. Defense Communications System (DCS)
(1) DCS is a single worldwide complex comprising a composite of certain DOD communications systems/networks under the management, control, and operational direction of the DISA. DCS includes all nontactical, long-haul, point-to-point, and switched network telecommunications facilities, personnel, and materiel within DOD.
(2) Organic facilities of the field armies, fleets, air forces, and fleet Marine forces, posts, camps, bases, stations, and air defense facilities are excluded.
c. Defense Information Systems Agency (DISA)
(1) The DISA is an agency of DOD under the direction, authority, and control of the Secretary of Defense, responsive to CJCS and combatant command C-3 requirements. The agency supports worldwide DCS through subcommands and DISA field organizations located with combatant commands and at major military and governmental population centers.
(2) Combatant command, subordinate command, and JTF nontactical communications support, including command and control, operations intelligence, weather, logistics, and administrative functions, is offered through the DCS facilities and managed by the DISA field organizations. DISA field organizations further serve as the points for integration of the station/tactical communications excluded in paragraph b(2) into the worldwide communications system.
4. COMMAND RELATIONSHIPS AND RESPONSIBILITIES
a. Chiefs of DISA field organizations and Service component commanders respond to the operational needs of the combatant commanders.
b. Combatant commanders will develop agreements that clearly delineate their relationships with DISA field organizations within their areas of responsibility.
c. Combatant commanders have command authority over the Service operating elements of the DCS through the Service component commander. DISA field organizations exercise operational direction over the DCS operating elements. Hence, the operating elements are subject to authoritative direction from different sources. To avoid conflict, combatant commanders will exercise combatant command in the direct operation of DCS by expressing their DCS operational requirements to the senior DISA field organization serving their area of responsibility.
d. Combatant commanders are authorized to assume temporary operational control of the DISA field organization and DCS within their assigned geographic areas in case of a major emergency.
e. The authority and responsibilities of the combatant commander include control, review, and coordination of assigned communications resources and/or actions affecting such resources.
f. The combatant commander is responsible for reviewing and coordinating major DCS communication requirements, projects, systems, networks, and related resources that are initiated within his command.
g. The combatant commander will designate the points where interface of various communications services between the DCS and tactical communications system will occur. Such points will normally include the following:
(1) Component command headquarters
(2) Joint task force headquarters
(3) Other subordinate element headquarters directly controlled by the combatant command
h. The component commanders have the following common functions and responsibilities in joint operations:
(1) Furnish communications personnel, equipment, and supplies for the effective performance of assigned tasks
(2) Furnish, organize, and train communications personnel for joint operations
(3) Supply, operate, and maintain command and control facilities organic to their own tactical forces
(4) Supply, operate, and maintain assigned facilities of the DCS and terminal equipment of DCS access circuits
(5) Furnish, operate, and maintain communications for distress, disaster, emergency, and safety as directed and per mutual agreements
(6) Offer the capability of meeting the DCS interface standards
(7) Cooperate with and assist other Services in the accomplishment of their communications functions
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