CG-47

ADMINISTRATIVE MESSAGE

ROUTINE

R 131234Z NOV 96  ZYB PSN 094950L27

FM PEO SC-AP WASHINGTON DC//PMS400F/PMS400B//

TO COMNAVSURFLANT NORFOLK VA//N6/N8/N43/N431A5//
COMNAVSURFPAC SAN DIEGO CA//N8/N43/N43111//
AIG ONE ONE TWO TWO FIVE

INFO COMNAVSEASYSCOM WASHINGTON DC//91W/03K2//
COMNAVAIRSYSCOM WASHINGTON DC//511B/546//
COMSPAWARSYSCOM WASHINGTON DC//05F1/05F21/PMW176//
NAVSURFWARCENDIV DAHLGREN VA//F52/F54//
COMSURFWARDEVGRU LITTLE CREEK VA//N4//
BUMED WASHINGTON DC//JJJ//
AEGIS TRACEN DAHLGREN VA//AN00//
NAVSURFWARCENDIV PORT HUENEME CA//4C00/4L00//
NAVORDCEN INDIAN HEAD MD//N00//

UNCLAS  //N08272//ACTION ADDEES OF AIG 11225 TAKE FOR INFO ONLY//

MSGID/GENADMIN/PEO SC-AP//

SUBJ/CG 47 CLASS ADVISORY NO. C002-94, AMENDMENT 1, HERP, HERO, EMI
/GUIDANCE FOR HELICOPTER OPERATIONS//

REF/A/RMG/AEGIS PROG MGR/021638ZAUG94//

AMPN/CG 47 CLASS ADVISORY C002-94, HERP, HERO, EMI GUIDANCE FOR
HELICOPTER OPERATIONS.//

RMKS/1.  THIS CLASS ADVISORY AMENDMENT MODIFIES THE GUIDANCE
CONTAINED IN REF A REGARDING OPERATIONAL RESTRICTIONS FOR HELICOPTERS
IN THE VICINITY OF AEGIS CRUISERS WITH AN/USC-38 EHF SATCOM SYSTEMS.
REF A PROMULGATED GUIDANCE REGARDING HERO SAFE DISTANCES FROM THE
AN/USC-38 SYSTEM ON AEGIS CRUISERS FOR ASQ-81 MAD EQUIPPED
HELICOPTERS.  THE MAD CABLE CUTTER WITH IMPULSE CARTRIDGE MK 23 MOD 0
WAS CLASSIFIED AS HERO SUSCEPTIBLE.

2.  NSWC DD HAS DETERMINED THE POWER LEVELS CREATED DURING AN/USC-38
TRANSMIT OPERATION WILL NOT EXCEED THE MAXIMUM ALLOWABLE ENVIRONMENT
FOR HERO SUSCEPTIBLE ORDNANCE.  CURRENT HELICOPTER OPERATING
RESTRICTIONS WITH REFERENCE TO THE ASQ-81 MAD CABLE CUTTER FROM
AN/USC-38 EMISSIONS ARE NO LONGER REQUIRED.  DELETE HERO RESTRICTION
LISTED IN REF A PARA 4 FOR AN/USC-38 EHF SATCOM.

3.  REF A ALSO PROMULGATED A MINIMUM SAFE DISTANCE OF 300 FEET FROM
THE AN/USC-38 SYSTEM FOR PERSONNEL IN HELICOPTERS OPERATING IN THE
VICINITY OF AEGIS CRUISERS.  NSWC DD HAS DETERMINED THAT THE
PERMISSIBLE EXPOSURE LIMIT FOR THE AN/USC-38 WILL NOT BE REACHED
BECAUSE OPERATION OF HELICOPTERS WITHIN THE BEAM OF THE AN/USC-38
WILL BLOCK THE SATELLITE LINK WHICH RESULTS IN CESSATION OF AN/USC-38
EMISSIONS WITHIN 30 SECONDS, THUS PREVENTING PERMISSIBLE EXPOSURE
LIMITS FROM BEING REACHED BY HELO CREW MEMBERS.  DELETE HERP
RESTRICTION LISTED IN REF A PARA 3 FOR AN/USC-38 EHF SATCOM.

4.  FOR COMNAVSURFLANT/COMNAVSURFPAC:  RECOMMEND CG 47 CLASS SHIPS BE
TASKED TO MODIFY REF A IAW PARAS 2 AND 3.  ALL OTHER GUIDANCE
CONTAINED IN REF A IS STILL APPLICABLE.

5.  ORIG POC IS MR. N. SMITHSON, PMS400F51L, DSN 332-5981, X133 OR
COMM (703) 602-5981, X133.  TPOC IS MR. M. BARE, NSWCDD, DSN 249-7832
OR COMM (540) 653-7832.//

BT