CG 47 CLASS ADVISORY NR 07-94
HERP-HERO GUIDANCE
REF/A/RMG/AEGIS PROG MGR/071856ZFEB92//
REF/B/DOC/OPNAV/-//
REF/C/DOC/NAVSEA/-//
REF/D/RMG/AEGIS PROG MGR/211708ZJUN93//
NARR/REF A IS CG 47 CLASS ADVISORY 04-91, REV ONE. REF B IS OPNAVINST
5100.23B, CHAP 22. REF C IS OP 3565, VOL II, PART 1, SIXTH REVISION.
REF D IS CG 47 CLASS ADVISORY C001-93.//
RMKS/1. THE PURPOSE OF THIS CLASS ADVISORY IS TO MODIFY THE GUIDANCE
CONTAINED IN REF A REGARDING HAZARDS OF ELECTROMAGNETIC RADIATION TO
PERSONNEL (HERP) AND HAZARDS OF ELECTROMAGNETIC RADIATION TO
ORDNANCE (HERO) DURING CG 47 CLASS SHIP OPERATIONS AND MAINTENANCE.
THIS ADVISORY ADDS A NOTE TO PARA 3.A.(1) ON THE POSSIBILITY OF AN/SPY-1A/B
AUTOMATICALLY TRANSITIONING FROM LOW POWER TO HIGH POWER, ADDS HERP
GUIDANCE ON AN/USC-38 EHF SATCOM AND INMARSAT, AND DELETES PERSONNEL
RESTRICTIONS ON THE BRIDGE WINGS DURING TRANSMISSION BY ANTENNA 2-3.
IT ADDS HERO GUIDANCE ON HELICOPTER CHAFF DISPENSERS AND MARINE
LOCATION MARKERS IN PARA 3.C, PROVIDES ADDITIONAL GUIDANCE ON RF BURN
IN PARA 3.D, AND ADDS PARA 4 ON HAZARDS OF ELECTROMAGNETIC RADIATION
TO FUEL (HERF). THIS ADVISORY SUPERSEDES AND CANCELS REF A.
2. BACKGROUND. CG 47 CLASS SHIPS HAVE SEVERAL RADAR SYSTEMS CAPABLE
OF GENERATING HIGH LEVELS OF RF ENERGY. REF B SPECIFIES PERMISSIBLE
EXPOSURE LIMITS (PELS) FOR PERSONNEL EXPOSURE TO RF RADIATION. THE
PELS FOR RESTRICTED AREAS (NO PASSENGERS LESS THAN 55 INCHES IN
HEIGHT) ARE LESS STRINGENT THAN THOSE FOR UNRESTRICTED AREAS. REF B
ALLOWS SHIPS TO USE THE LESS STRINGENT PELS FOR RESTRICTED AREAS
UNLESS THEY ARE IN PORT OR CARRYING PASSENGERS LESS THAN 55 INCHES IN
HEIGHT. HERP SAFE DISTANCES SPECIFIED IN THIS ADVISORY ARE BASED ON THE
MORE STRINGENT PELS FOR UNRESTRICTED AREAS. HOWEVER, HERP SAFE
DISTANCES FOR THE PELS FOR RESTRICTED AREAS ARE ALSO PROVIDED IN THE
TABLE IN PARA 3.B.(1). SHIPS SHOULD ADHERE TO THE GREATER HERP SAFE
DISTANCES UNLESS THEY ARE PROHIBITIVELY RESTRICTIVE FOR CERTAIN AT-SEA
OPERATIONS. SOME ELEMENTS OF ORDNANCE USED IN CG 47 CLASS SHIPS ARE
SUSCEPTIBLE TO RF ENERGY. THROUGH A COMBINATION OF PERSONNEL ACCESS
CONSTRAINTS, RADIATION ZONE CONTROL, OUTPUT POWER CONTROL AND
MAINTENANCE OF SAFE SEPARATION DISTANCES, HERP AND HERO PROBLEMS
CAN BE PREVENTED. CONTROL FEATURES INHERENT IN THE VARIOUS RADAR
SYSTEM DESIGNS, WITH STRICT PROCEDURE IMPLEMENTATION, CAN PROVIDE
EFFECTIVE RF SAFETY WITH MINIMAL OPERATIONAL IMPACT.
3. ACTION. THE PROCEDURES CONTAINED HEREIN MUST BE ADHERED TO IN
ORDER TO PROVIDE PROPER SAFETY MARGINS FOR PERSONNEL AND ORDNANCE
MATERIALS.
A. HERP PRECAUTIONS IN PORT:
(1) AN/SPY-1A/B. HIGH POWER RADIATION IN PORT IS
PERMITTED ONLY WHEN THE QUADRATURE ALIGNMENT OF THE TRANSMITTER IS
WITHIN PMS LIMITS. HIGH POWER OPERATION SHALL BE IN MAINTENANCE MODE
UNDER LOCAL CONTROL EXCEPT FOR THE FOLLOWING TESTS:
(A) AN/SPY-1A/B: MIP 4560/501, MRC FKFQ (2D-1)
(EII 1.12.X.7.9Y, X EQUALS 1-4, Y EQUALS 0-9) TRANSMITTER PHASE AND
POWER TESTS OF THE FOUR ARRAYS.
(B) AN/SPY-1A: EII 1.12.Y.7.22, OPERATIONAL
PERFORMANCE TEST MTI WAVEFORM PHASE STABILITY TEST (Y EQUALS 1, 3).
AN/SPY-1B: EII 1.12.5.2.Y, MTI TRANSMITTER
STABILITY TEST (Y EQUALS 1, 4).
(C) AN/SPY-1A: EII 1.12.1.7.3Z AND 1.12.3.7.3Z,
MISSILE UPLINK MONITOR TESTS (Z EQUALS 1, 3, 5, 7, 9).
AN/SPY-1B: EII 1.12.5.3.3Z AND 1.12.5.4.3Z,
MISSILE UPLINK TEST (Z EQUALS 0-9).
THESE TESTS MAY BE CONDUCTED IN PORT USING THE FOLLOWING
PROCEDURE. PRIOR TO INITIALIZATION AT THE OPERATIONAL READINESS TEST
SYSTEM (ORTS) CONSOLE PERFORM THE FOLLOWING:
(1) AT THE RADAR SYSTEM CONTROLLER (RSC) CONSOLE
IN BASELINE CONTROL:
(A) PLACE SEARCH ELEVATION TO ZERO DEGREES.
(B) HORIZON SEARCH OFF.
(C) SEARCH MODE NORMAL.
(D) VERIFY NO SECTOR OR RADIATION ZONES.
(2) AT THE AN/SPY-1A/B AN/UYK-7 COMPUTER,
POSITION 7 STOP TO THE UP POSITION ON BOTH
BAY 3 AND 4.
(3) AT THE AN/SPY-1B AN/UYK-43 COMPUTER:
(A) POWER DOWN MEMORY UNIT 9 FROM THE
COMPUTER DCU.
(B) ON BOTH CPU 0 AND CPU 1 SET THE 6 STOP
AND 7 STOP BUTTONS TO ON AT THE COMPUTER DCU.
AN/SPY-1A/B OPERATION BOTH IN MAINTENANCE MODE
UNDER LOCAL CONTROL AND USING THE ABOVE
PROCEDURE PLACES THE BEAM AT THE ZENITH POSITION.
(NOTE: THESE PROCEDURES MUST BE FOLLOWED REGARDLESS OF WHETHER
AT-SEA OR IN-PORT DISK SETS ARE USED). FOR THESE OPERATIONS, THE
HAZARDOUS ZONE IS BOUNDED BY THE BOTTOM OF THE ARRAY, 10 FEET TO EACH
SIDE OF THE ARRAY OUT TO A DISTANCE IN FRONT OF THE ARRAY OF 45 FEET FOR
AN/SPY-1A AND 10 FEET FOR AN/SPY-1B, AND 1,580 FEET ABOVE THE ARRAYHE THE
HAZNG TUS ZONE BOUNDA ES ARE THE SN/E WHEN RADIATI 4 TO ZENITH INKFOW
POWER, EIIPT THAT THE HAX RDOUS ZONE, Y ENDS TO ONLYTRAN0 FEET ABOVE
THE ARRAY. PESTS OF MUST BE WARNED NOT TO LEAN OVER RAILS ABOVE THE
ARRAY FACES. FOR PMS TESTING REQUIRING RADIATION FROM THE STARBOARD
AND/OR PORT ARRAY, NESTED SHIPS SHOULD BE ADVISED TO KEEP PERSONNEL
OUTSIDE THE HAZARDOUS ZONE OR INSIDE THE SKIN OF THE SHIP. MOST PMS
TESTING CAN BE CONDUCTED USING THE FORWARD AND AFT ARRAYS, THEREBY
MINIMIZING THE TIME PERIOD FOR RESTRICTED ZONES ON THE ADJACENT SHIP.
THE HELICOPTER LIGHTING SERVICE PLATFORM ALLOWS PERSONNEL ACCESS TO
A HERP ZONE DIRECTLY IN FRONT OF THE AFT ARRAY FACE. THE ACCESS IS
NORMALLY BARRICADED, BUT STRINGENT PROCEDURES MUST BE IMPLEMENTED
TO PREVENT PERSONNEL FROM UNKNOWINGLY ACCESSING THE AREA WHEN THE
RADAR IS ACTIVE. DURING SEARCH AND TRACK OPERATIONS IN LOW POWER, THE
MAIN BEAM HERP SAFE SEPARATION DISTANCE BETWEEN THE AN/SPY-1A/B
ARRAYS AND PERSONNEL IS 50 FEET.
(NOTE: WHEN USING THE SECTOR POWER CONTROL, AN/SPY-1A/B WILL
AUTOMATICALLY EMIT HIGH POWER TRACK DWELLS. THIS IS MORE LIKELY TO
OCCUR ON SHIPS WITH BASELINES 1.4 OR 2.9 COMPUTER PROGRAMS BECAUSE OF
CHANGES INCORPORATED IN THOSE PROGRAMS. IN ORDER TO PREVENT THE
EMISSION OF HIGH POWER TRACK DWELLS WHILE IN LOW
POWER, SHIPS WHICH HAVE BASELINES 1.4 OR 2.9 COMPUTER PROGRAMS
SHOULD USE THE DECKHOUSE POWER CONTROL. OTHER SHIPS SHOULD USE THE
AZIMUTH RADIATION CONTROL IN COMBINATION WITH THE RESTRICTIONS IN
PARAGRAPH 6 OF REF D. AS AN ADDED PRECAUTION THE FINAL POWER
AMPLIFIERS (FPA) CAN BE TURNED OFF (TO PREVENT HIGH POWER OPERATIONS)
BY PLACING ALL FPA CABINETS IN LOCAL STANDBY CONTROL MODE.)
(2) FIRE CONTROL SYSTEM MK 99. EXTERNAL CW ILLUMINATOR RADIATION
MUST ALWAYS BE UNDER CONTROL OF C&D/WCS (E.G., SIMULATED
ENGAGEMENT). THE BEAM MUST NOT BE DIRECTED TOWARD ANY BUILDING, SHIP
STRUCTURE, OR MANNED AREA (I.E., CRANES, BUILDINGS, TOWERS AND
ADJOINING SUPERSTRUCTURES). BY SELECTIVE TARGET DESIGNATION IN CLEAR
AREAS AUTHORIZED BY THE COGNIZANT PORT AUTHORITY, LIMITED ILLUMINATOR
OPERATION CAN BE ACCOMPLISHED. THE ILLUMINATOR MAIN BEAM HERP SAFE
DISTANCE IS 1850 FEET.
(3) EW SYSTEM AN/SLQ-32(V)3. THE SLQ-32(V)3 SYSTEM SHALL HAVE THE
TRANSMITTER OUTBOARD SPECIAL TEST EQUIPMENT (TOSTE) INSTALLED TO
SUPPRESS RADIATION WHILE OPERATING IN PORT.
(4) RADAR SYSTEM AN/SPS-49. SPS-49, WHILE ROTATING, DOES NOT CREATE
ANY HERP AREAS, BUT EMI EFFECTS TO COMMERCIAL TV, RADIO RECEIVERS, AND
WEATHER OR AIR TRAFFIC CONTROL RADARS MAY LIMIT ITS USE IN PORT.
CONTACT THE COGNIZANT PORT AUTHORITY PRIOR TO OPERATION. IF SPS-49 IS
RADIATING WITH THE ANTENNA STATIONARY, THE MAIN BEAM HERP SAFE
DISTANCE IS 400 FEET.
(5) RADAR SYSTEM AN/SPQ-9A. DURING NORMAL OPERATION WITH THE
ANTENNA ROTATING SPQ-9A DOES NOT CREATE A RADIATION HAZARD. IF SPQ-9A
IS RADIATING WITH THE ANTENNA STATIONARY, THE MAIN BEAM HERP SAFE
DISTANCE IS 95 FEET. IN THIS MODE THE ANTENNA SHALL BE DIRECTED ONLY TO
CLEAR AREAS AS AUTHORIZED BY THE COGNIZANT PORT AUTHORITY.
(6) PHALANX WEAPON SYSTEM. IN PORT, PHALANX SHALL BE ALLOWED TO
RADIATE ONLY TO CLEAR AREAS AS AUTHORIZED BY THE COGNIZANT PORT
AUTHORITY. THE MAIN BEAM HERP SAFE DISTANCE IS 135 FEET.
(7) RADAR SYSTEM AN/SPS-55. DURING NORMAL OPERATION WITH THE
ANTENNA ROTATING SPS-55 DOES NOT CREATE A RADIATION HAZARD. IF SPS-55
IS RADIATING WITH THE ANTENNA STATIONARY, THE MAIN BEAM HERP SAFE
DISTANCE IS 30 FEET.
(8) AN/WSC-3 SATCOM. WSC-3 CAN CREATE RF LEVELS EXCEEDING THE PEL
OUT TO 15 FEET FROM THE WSC-1 ANTENNAS. THESE ANTENNAS ARE IN A MAN
ALOFT AREA AND WILL NOT PRODUCE RF LEVELS EXCEEDING THE PEL IN ANY
NORMALLY OCCUPIABLE AREA.
(9) RADAR SET AN/SPS-64. DURING NORMAL OPERATION WITH THE ANTENNA
ROTATING SPS-64 DOES NOT CREATE A RADIATION HAZARD. IF SPS-64 IS
RADIATING WITH THE ANTENNA STATIONARY, THE MAIN BEAM HERP SAFE
DISTANCE IS THREE FEET.
(10) ANTENNA 2-4 (AS-2807/SRC). ANTENNA 2-4 CAN CAUSE HAZARDOUS
RADIATION LEVELS OUT TO 10 FEET FROM THE ANTENNA.
(11) AN/USC-38 EHF SATCOM. THE TRANSMIT BEAM MUST NOT BE DIRECTED
TOWARD NESTED SHIP SUPERSTRUCTURES, BUILDINGS OR MANNED AREAS (I.E.,
CRANES AND TOWERS). THE MAIN BEAM HERP SAFE DISTANCE IS 300 FEET. EHF
SATCOM WILL NOT CREATE RF LEVELS EXCEEDING THE PEL IN ANY MANNED
WEATHER DECK AREA.
(12) INMARSAT MX 2400/SATURN 3S.90 INTEGRATED SATCOM
TERMINAL. INMARSAT CAN PRODUCE RF LEVELS EXCEEDING THE PEL OUT TO 7.5
FEET FROM THE SURFACE OF THE RADOME. DUE TO THE GENERAL ANTENNA
LOCATION (THERE ARE SOME MINOR VARIANCES BETWEEN INSTALLATIONS), RF
LEVELS EXCEEDING THE PEL WILL NOT EXIST IN ANY MANNED WEATHER DECK
AREA.
(13) OTHER RADIATION RESTRICTIONS MAY BE SPECIFIED BY THE
PARTICULAR PORT. ADVANCE CONTACT WITH PORT AUTHORITIES SHOULD BE
ESTABLISHED.
B. HERP PRECAUTIONS AT SEA:
(1) HERP SAFE SEPARATION DISTANCES. MAIN BEAM HERP SAFE
SEPARATION DISTANCES SHOWN BELOW MUST BE MAINTAINED IN A MULTIPLE
SHIP ENVIRONMENT. PERSONNEL ON SHIPS ALONGSIDE CG 47 CLASS SHIPS MUST
NOT BE RADIATED BY THE MAIN BEAM OF RADARS LISTED BELOW IF THEY ARE
WITHIN THE MINIMUM SAFE DISTANCE. SHIPS SHOULD ADHERE TO THE
UNRESTRICTED DISTANCES UNLESS THEY ARE PROHIBITIVELY RESTRICTIVE FOR
CERTAIN AT-SEA OPERATIONS. IN THOSE INSTANCES THE RESTRICTED
DISTANCES CAN BE USED. RADIATING ELEMENTS NOT SHOWN DO NOT CREATE
HERP CONDITIONS BEYOND THE SHIP BOUNDARIES IN THEIR NORMAL OPERATING
MODES.
RF SOURCE MINIMUM SAFE SEPARATION DISTANCE (FEET)
UNRESTRICTED RESTRICTED
AN/SPY-1A/B (HIGH POWER) 520 360
AN/SPY-1A/B (LOW POWER) 50 30
AN/SPG-62 (FCS MK 99) 1850 1310
AN/USC-38 EHF SATCOM 300 210
AN/SLQ-32 125 90
PHALANX 135 90
(2) MAN ALOFT. THE 06 LEVEL AND ABOVE IS A MAN ALOFT AREA, AS IS
THE SERVICE PLATFORM ON THE 04 LEVEL AFT OF THE AFT
AN/SPY-1A/B ARRAY. FOR SHIPS HAVING HF TRANSMITTING ANTENNA 2-4, THE 04
LEVEL AND ABOVE, OUTBOARD AND AFT OF THE FORWARD END OF THE AFT
STACK, IS A MAN ALOFT AREA. WARNING SIGNS AND A CHAIN OR ROPE BARRIER
SHOULD BE USED TO RESTRICT ACCESS TO THIS AREA. PROCEDURES SHALL BE
ESTABLISHED TO INSURE RADAR AND RADIO TRANSMITTERS ARE
SECURED WHILE MEN ARE ALOFT.
(3) WEATHER DECK.
(A) THE 03 LEVEL OUTBOARD OF THE ROPED OFF AREA
FORWARD OF THE AN/SLQ-32 IS HAZARDOUS WHEN THE ACTIVE EMITTERS ARE
RADIATING. PERSONNEL SHOULD BE RESTRICTED FROM THIS AREA WHEN THE
AN/SLQ-32 IS RADIATING OR WHEN ITS AECM FUNCTION IS OPERATING IN THE
AUTOMATIC (AUTO) MODE.
(B) IF THE AN/SPG-62 IS RADIATED IN TEST OR TRAINING MODE WITH
BATTLESHORT ENABLED, ENSURE THAT EITHER EXPOSED WEATHER DECK AREAS
ARE CLEAR OF PERSONNEL OR DIRECTORS ARE NOT DIRECTED INTO RADIATION
CUTOUT ZONES.
(C) ALL OTHER MANNED WEATHER DECK AREAS ARE SAFE.
C. HERO PRECAUTIONS: THE FOLLOWING GENERAL GUIDANCE IS
PROVIDED. HOWEVER, SPECIFIC GUIDANCE MAY DIFFER FOR SPECIFIC SHIPS
BASED ON THE RESULTS OF THAT SHIP'S HERO SURVEY. REFER TO SHIP'S HERO
BILL AND REF C FOR SPECIFIC GUIDANCE.
(1) GENERAL HERO REQUIREMENTS. THE GENERAL HERO
REQUIREMENTS OF SECTIONS 5-3 AND 5-4 OF REF C SHALL BE FOLLOWED.
(2) PHALANX AMMUNITION. HF TRANSMITTERS 2-1 THROUGH 2-4 AND RADAR
SET AN/SPS-49 SHOULD BE SILENCED DURING
HANDLING/LOADING OF LOOSE OR BARE ROUNDS. HF TRANSMITTERS 2-1 AND 2-2
POWER OUTPUT SHOULD BE LIMITED TO 300 WATTS DURING
PRESENCE CONDITIONS. AN/SPY-1A/B RADIATION RESTRICTIONS ARE NOT
REQUIRED DURING PHALANX AMMO HANDLING BECAUSE OF THE RELATIVE
LOCATION OF THE SPY-1A/B ARRAYS RELATIVE TO THE PHALANX MOUNTS AND
AMMO HANDLING AREAS. THE HERO SEPARATION DISTANCE FOR AN/SPY-1A/B
ILLUMINATION OF OTHER SHIPS, WHEN THEY ARE HANDLING
OR LOADING PHALANX 20 MM LOOSE OR BARE ROUNDS, OR UNLOADING OR
CLEARING THE GUN, IS 8,170 FEET (HIGH POWER) AND 2,045 FEET (LOW POWER).
(3) SRBOC. AN/SLQ-32 RADIATION SHOULD BE INHIBITED WHEN
CONDUCTING SRBOC HANDLING AND LOADING OPERATIONS (CG 47-62 ONLY).
(4) 5-INCH, 54 CALIBER GUN MOUNT MK 45 AMMUNITION. THE MK 15 AND MK
44 ELECTRIC PRIMERS ARE HERO SUSCEPTIBLE ORDNANCE. HANDLING EXPOSED
PRIMERS ON THE WEATHER DECK REQUIRES THE FOLLOWING EMCON: WHEN
HANDLING IN THE VICINITY OF MOUNT 51, SILENCE ALL HF TRANSMITTERS AND
THE FORWARD AN/SPY-1 ARRAY; WHEN HANDLING IN THE VICINITY OF MOUNT 52,
SILENCE ALL HF TRANSMITTERS AND THE AFT AN/SPY-1 ARRAY.
(5) ASROC. ASROC CONFIGURED WITH ISA MK 4 MOD 0 IS HERO SAFE AND
THERE ARE NO HERO RESTRICTIONS ON OPERATIONS WITH THIS MISSILE. ASROC
CONFIGURED WITH ISA MK 3 MOD 2 IS HERO SUSCEPTIBLE AND SHOULD NOT BE
EXPOSED TO MAIN BEAM HIGH POWER ILLUMINATION BY THE AN/SPY-1A OR TO
MAIN BEAM ILLUMINATION BY THE AN/SPG-62. ADDITIONALLY, HF TRANSMISSION
BY THE 10-30 MHZ TWIN WHIP ANTENNA ATOP THE PILOT HOUSE SHOULD BE
DISCONTINUED DURING HANDLING, LOADING, OR PRESENCE OF ASROC
CONFIGURED WITH ISA MK 3 MOD 2 IN THE VICINITY OF THE FORWARD GMLS MK 26
LAUNCHER. THERE IS NO HAZARD IF THE MISSILE IS IN ITS CONTAINER OR WITHIN
THE GMLS MK 26 MAGAZINE. SEE REF C FOR NALCS OF HERO SUSCEPTIBLE
ROUNDS.
(6) AN/ALE-29, -37A, AND -39 CHAFF DISPENSERS. MF29 AND MF60
IMPULSE CARTRIDGES USED IN THE CHAFF DISPENSERS ARE HERO SUSCEPTIBLE.
ASSEMBLY OPERATIONS INVOLVING REPLACEMENT OF CARTRIDGES OR REMOVAL
OF THE SQUIB BOARDS SHOULD BE CONDUCTED IN DESIGNATED SPACES WITHIN
THE SHIP. IF THESE OPERATIONS ARE CONDUCTED ON THE FLIGHT DECK,
RADIATION SHOULD BE INHIBITED FROM THE AFT AN/SPY-1A/B ARRAY, AND FROM
THE AN/SPS-49 RADAR AT ELEVATIONS BELOW 0 DEGREES.
(7) MARINE LOCATION MARKER MK 25 MOD 4. THIS MARINE
LOCATION MARKER IS HERO SUSCEPTIBLE. RF ENVIRONMENTS ON THE WEATHER
DECKS EXCEED THE ALLOWABLE ENVIRONMENTS FOR THE ARMED MARINE
LOCATION MARKER. IF OPERATIONS INVOLVE HAVING AN ARMED DEVICE ON THE
WEATHER DECKS, TRANSMISSION FROM HF ANTENNAS 2-1, 2-2, 2-3, 2-4 AND MARS,
FROM THE AN/SPS-49, AND FROM ALL AIRCRAFT TRANSMITTERS SHOULD BE
PROHIBITED. ADDITIONALLY, RADIATION FROM THE FORWARD AN/SPY-1A/B ARRAY
SHOULD BE INHIBITED FOR OPERATIONS ON WEATHER DECKS FORWARD OF THE
FORWARD ARRAY, AND RADIATION FROM THE AFT AN/SPY-1A/B ARRAY SHOULD BE
INHIBITED FOR OPERATIONS ON WEATHER DECKS AFT OF THE AFT ARRAY.
D. RF BURN. RF BURN HAZARDS CAN EXIST DURING HELICOPTER
OPERATIONS ON THE HELO DECK, AFT VLS STRIKEDOWN CRANE OPERATIONS,
AND MOTOR WHALE BOAT OR RIGID INFLATABLE BOAT OPERATIONS AND
MAINTENANCE.
(1) HELICOPTER OPERATIONS. ANTENNA 2-4 CAN CAUSE RF BURN HAZARDS
ON A HELICOPTER ON THE HELO DECK. ANTENNA 2-4 SHOULD NOT BE USED TO
TRANSMIT DURING OPERATIONS INVOLVING MAINTENANCE OR HANDLING OF THE
HELICOPTER.
(2) AFT VLS STRIKEDOWN CRANE. A RF BURN HAZARD CAN EXIST ON THE
AFT VLS STRIKEDOWN CRANE HOOK WHEN ANTENNA 2-4 IS TRANSMITTING AT
FREQUENCIES BETWEEN 3.5 MHZ AND 7 MHZ. ANTENNA 2-4 SHOULD NOT BE USED
TO TRANSMIT IN THIS FREQUENCY RANGE DURING OPERATIONS WITH THE AFT VLS
STRIKEDOWN CRANE.
(3) MOTOR WHALE BOAT (MWB). ANTENNA 2-4 CAN CAUSE RF BURN
CONDITIONS TO EXIST ON THE MWB AND ITS DAVIT. ANTENNA 2-4 SHOULD NOT BE
USED TO TRANSMIT DURING MWB OPERATIONS OR MAINTENANCE. IF IT IS
ABSOLUTELY NECESSARY TO TRANSMIT FROM ANTENNA 2-4 DURING THESE
OPERATIONS, HF TRANSMITTER POWER SHOULD BE LIMITED TO 375 WATTS FOR
FREQUENCIES BETWEEN 6 MHZ AND 9 MHZ.
(4) RIGID INFLATABLE BOAT (RIB). RF BURN CONDITIONS CAN EXIST
ON THE RIB DAVIT HOOK AND SURROUNDING METALLIC OBJECTS DURING TRANSMISSION
BY ANTENNAS 2-2 AND 2-4. BEFORE PERSONNEL ENTER THE RIB, ANTENNA 2-2
TRANSMISSION SHOULD BE SECURED BETWEEN FREQUENCIES OF 7.5 MHZ AND 9.2
MHZ, AND ANTENNA 2-4 TRANSMISSION SHOULD BE SECURED BETWEEN
FREQUENCIES OF 6.5 MHZ AND 12.0 MHZ.
4. HERF. THERE ARE NO SPECIAL HERF EMCON RESTRICTIONS DURING
REFUELING WITH JP-5. EXISTING HERP, HERO AND EMI RESTRICTIONS APPLY AS
APPROPRIATE.
5. ADDITIONAL HERP, HERO, AND EMI PRECAUTIONS FOR CG 47 CLASS SHIPS
DURING HELICOPTER OPERATIONS ARE ADDRESSED IN REF D.
6. FOR COMNAVSURFLANT/COMNAVSURFPAC - RECOMMEND CG 47 CLASS SHIPS
BE TASKED TO ADHERE TO THE PROVISIONS OF PARA 3 ABOVE.
7. THIS INFORMATION WILL BE INCLUDED IN THE AEGIS CSTOM AND CSOSS. THIS
ADVISORY HAS NO IMPACT ON EOSS OR PMS. IT WILL REMAIN OPEN UNTIL
SUPERSEDED BY REVISED HERP/HERO GUIDANCE.
8. ORIG POC IS MR. N. S. SMITHSON, PMS400F511, DSN 332-5981, EXT 133 OR COMM
(703) 602-5981, EXT 133. TPOC IS MR. M. D. BARE, NSWCDD, DSN 249-7832 OR COMM
(703) 663-7832.//
CG-47