ADMINISTRATIVE MESSAGE
ROUTINE
R 031300Z DEC 96 ZYB PSN 329593L31
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 THREE EIGHT SIX ONE
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//
USS MILIUS
PRECOMUNIT MAHAN
UNCLAS //N08272//ACTION ADDEES OF AIG 13861 TAKE FOR INFO ONLY//
MSGID/GENADMIN/PEO SC-AP//
SUBJ/DDG 51 CLASS ADVISORY NO. C003-94, AMENDMENT 1, HERP, HERO, EMI
/GUIDANCE FOR HELICOPTER OPERATIONS//
REF/A/RMG/AEGIS PROG MGR/021639ZAUG94//
AMPN/DDG 51 CLASS ADVISORY C003-94, 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 DESTROYERS WITH AN/USC-38 EHF SATCOM
SYSTEMS. REF A PROMULGATED GUIDANCE REGARDING HERO SAFE DISTANCES
FROM THE AN/USC-38 SYSTEM ON AEGIS DESTROYERS 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 DESTROYERS. 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 DDG 51 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
DDG-51