DDG 51 CLASS ADVISORY NR 08-91R3
HERP-HERO GUIDANCE
REF/A/RMG/AEGIS PROG MGR/151649ZJUN93//
REF/B/DOC/OPNAV/-//
REF/C/DOC/NAVSEA/-//
REF/D/RMG/AEGIS PROG MGR/211709ZJUN93//
NARR/REF A IS DDG 51 CLASS ADVISORY 08-91 REV 2. REF B IS
OPNAVINST 5100.23B, CHAP 22. REF C IS OP 3565, VOL II, PART 1 (SIXTH
REV). REF D IS DDG 51 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 DDG 51 CLASS SHIP OPERATIONS AND MAINTENANCE. THIS
ADVISORY MODIFIES PARAS 3.A(1) AND 3.B(3)(D) TO RESTRICT PERSONNEL
FROM PART OF THE BRIDGE WING AREA DURING AN/SPY-1D HIGH POWER
RADIATION TO ZENITH. THESE RESTRICTIONS ARE A RESULT OF RECENT
MEASUREMENTS WHICH IDENTIFIED RF HOT SPOTS RESULTING FROM SPY-1D
RADIATION REFLECTIONS FROM THE YARDARM. IT MODIFIES GUIDANCE ON
ANTENNA 2-4 IN PARA 3.A(8), ADDS GUIDANCE ON A RF BURN HAZARD DURING
RIGID INFLATABLE BOAT (RIB) OPERATIONS TO PARA 5 AND ADDS PARA
3.A(12) ON INMARSAT AND PARA 6 ON HAZARDS OF ELECTROMAGNETIC
RADIATION TO FUEL (HERF). REF A IS SUPERSEDED AND CANCELLED BY THIS
REVISION.
2. BACKGROUND. DDG 51 CLASS SHIPS HAVE SEVERAL RADAR SYSTEMS
CAPABLE OF GENERATING HAZARDOUS LEVELS OF RF ENERGY. REF B SPECIFIES
MAXIMUM PERMISSIBLE EXPOSURE LIMITS (PEL) FOR PERSONNEL EXPOSURE TO
RF RADIATION. FOR RADARS WITH FREQUENCIES GREATER THAN 1.5 GHZ, THE
PEL IS 5 MW/SQ CM. SOME ELEMENTS OF ORDNANCE ARE ALSO 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 AND WARNING SIGNS, 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-1D. 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) MRC 4560 (R-2W) - TRANSMITTER PHASE AND POWER TESTS
OF THE FOUR ARRAYS (IOT/1.12.X.7.9Y; X EQUALS 1-4; Y EQUALS 0-9).
(B) EII 1.12.5.2.Y (Y EQUALS 1) MTI TRANSMITTER
STABILITY TEST.
(C) EII 1.12.5.X.3Y.1 (X EQUALS 3; Y EQUALS 0-9)
MISSILE UPLINK TEST.
THESE TESTS MAY BE CONDUCTED IN PORT USING THE FOLLOWING PROCEDURES.
PRIOR TO INITIALIZATION OF 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-1D 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-1D OPERATION BOTH IN MAINTENANCE MODE UNDER LOCAL CONTROL AND
USING THE ABOVE PROCEDURE PLACES THE AN/SPY-1D 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 OF 10 FEET IN FRONT OF THE
ARRAY AND 1580 FEET ABOVE THE ARRAY. THE HAZARDOUS ZONE BOUNDARIES
ARE THE SAME WHEN RADIATING TO ZENITH IN LOW POWER EXCEPT THAT THE
HAZARDOUS ZONE EXTENDS TO 370 FEET ABOVE THE ARRAY. DURING HIGH
POWER RADIATION TO ZENITH FROM THE AFT SPY ARRAYS THE BRIDGE WING
AREA NEAR THE AFT ARRAYS MAY BE EXPOSED TO RF LEVELS EXCEEDING THE
PEL DUE TO YARDARM REFLECTIONS. PERSONNEL SHOULD BE RESTRICTED FROM
THE BRIDGE WING AREA NEAR THE AFT ARRAYS, 04 LEVEL BETWEEN FRAMES 160
AND 170, DURING THESE OPERATIONS. ADDITIONALLY, PERSONNEL MUST BE
WARNED NOT TO LEAN OVER THE BRIDGE WINGS ABOVE THE ARRAY FACES.
NESTED SHIPS MUST BE ADVISED TO KEEP PERSONNEL OUTSIDE OF THE
HAZARDOUS ZONE OR WITHIN THE SKIN OF THE SHIP DURING PMS TESTING.
DURING SEARCH AND TRACK OPERATIONS IN LOW POWER, THE MINIMUM SAFE
SEPARATION BETWEEN THE AN/SPY-1D ARRAYS AND PERSONNEL IS 50 FEET.
(2) FIRE CONTROL SYSTEM, MK 99 MOD 3. 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 MINIMUM SAFE SEPARATION DISTANCE IS 1850 FEET.
(3) AN/SLQ-32(V)2. THE AN/SLQ-32(V)2 DOES NOT RADIATE RF
ENERGY. NO HERP/HERO PRECAUTIONS ARE REQUIRED.
(4) PHALANX (CIWS) WEAPON SYSTEM. IN PORT, PHALANX SHALL BE
ALLOWED TO RADIATE ONLY TO CLEAR AREAS AS AUTHORIZED BY THE COGNIZANT
PORT AUTHORITY. THE MAIN BEAM MINIMUM SAFE SEPARATION DISTANCE IS
135 FEET.
(5) OE-409/SRC TWIN FAN ANTENNAS (ANTENNA 2-1). THE TWIN
FAN ANTENNAS WILL NOT PRODUCE HAZARDOUS RADIATION IN ANY NORMALLY
OCCUPIABLE AREA ON OR BELOW THE 05 LEVEL.
(6) 0E-415(V)1/SRC TWIN WHIP ANTENNAS (ANTENNA 2-2). THE
35 FOOT TWIN WHIP ANTENNAS SHOULD BE SECURED BEFORE PERSONNEL ENTER
THE AREA OF THE ANTENNA MAINTENANCE PLATFORM.
(7) OE-418(V)1/SRC TWIN WHIP ANTENNAS (ANTENNA 2-3). THE
18 FOOT TWIN WHIP ANTENNAS CAN PRODUCE RF LEVELS EXCEEDING THE PEL ON
THE 02 LEVEL DIRECTLY BELOW THE ANTENNA AND ON THE 01 LEVEL CLOSE TO
THE PORT AND STARBOARD RAS HINGED KINGPOSTS WHEN THE ANTENNA IS
ENERGIZED AT 1000 WATTS AT FREQUENCIES ABOVE 18 MHZ. WHEN OPERATING
ANTENNA 2-3 AT FREQUENCIES ABOVE 18 MHZ, POWER OUTPUT SHOULD NOT
EXCEED 250 WATTS.
(8) OE-417/SRC EMERGENCY TILTING WHIP ANTENNA (ANTENNA
2-4). THE 35 FOOT SINGLE WHIP EMERGENCY ANTENNA CAN PRODUCE RF
LEVELS THAT EXCEED THE PEL ON THE 02 LEVEL PORT SIDE IN THE VICINITY
OF THE ANTENNA. WHEN THE ANTENNA IS ENERGIZED, PERSONNEL SHOULD NOT
ENTER THE 02 LEVEL PORT SIDE BETWEEN FRAMES 246 AND 312 WITHOUT
PERMISSION. IF PERSONNEL ARE GRANTED ACCESS TO THIS AREA AND THE
ANTENNA IS OPERATED AT FREQUENCIES ABOVE 20 MHZ, POWER OUTPUT SHOULD
NOT EXCEED 250 WATTS. PERSONNEL GRANTED PERMISSION TO ENTER THIS
AREA SHOULD NOT APPROACH WITHIN FOUR FEET OF THE ANTENNA, AND SHOULD
NOT REMAIN WITHIN 12 FEET OF THE ANTENNA LONGER THAN THE TIME FOR
NORMAL WALKTHROUGH.
(9) AS-3771/U WHIP MARS ANTENNA (ANTENNA 2-5). THE 14 FOOT
WHIP ANTENNA CAN PRODUCE RF LEVELS IN THE FLAG BAG AREA THAT EXCEED
THE PEL WHEN MARS IS OPERATING IN THE RTTY MODE. IF PERSONNEL ARE IN
THE FLAG BAG AREA WHEN MARS IS OPERATED IN THE RTTY MODE AT
FREQUENCIES ABOVE THE 20 METER BAND (15 MHZ), PLATE INPUT POWER
SHOULD NOT EXCEED 250 WATTS.
(10) AN/WSC-3 SATCOM (ANTENNAS 3-10A AND 3-10B). WSC-3 CAN
PRODUCE RF LEVELS EXCEEDING THE PEL OUT TO 15 FEET FROM THE ANTENNA.
THESE ANTENNAS ARE IN A MAN ALOFT AREA AND WILL NOT PRODUCE RF LEVELS
EXCEEDING THE PEL IN ANY NORMALLY OCCUPIABLE AREA.
(11) RADAR SET AN/SPS-67(V)2 (ANTENNA 5-1). DURING NORMAL
OPERATION WITH THE ANTENNA ROTATING, SPS-67 DOES NOT CREATE A
RADIATION HAZARD. IF SPS-67 IS RADIATING WITH THE ANTENNA
STATIONARY, THE MAIN BEAM MINIMUM SAFE SEPARATION DISTANCE IS 70
FEET.
(12) INMARSAT MX 2400 AND 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 ANTENNA
LOCATION, RF LEVELS EXCEEDING THE PEL WILL NOT BE PRODUCED IN ANY
MANNED WEATHER DECK AREA.
(13) ALL OTHER EMITTERS ON THE MAST, YARDARMS, AND POLE
HAVE FIXED BEAM HAZARD DISTANCES OF THREE FEET OR LESS. NONE OF
THESE EMITTERS CREATE A HAZARD OUTSIDE OF THE MAN ALOFT BOUNDARY.
(14) 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 OR HELICOPTERS OPERATING
ALONGSIDE DDG 51 CLASS SHIPS MUST NOT BE RADIATED BY THE MAIN BEAM OF
RADARS LISTED BELOW IF THEY ARE WITHIN THE MINIMUM SAFE DISTANCE.
RADIATING ELEMENTS NOT SHOWN DO NOT CREATE HERP CONDITIONS BEYOND THE
SHIP BOUNDARIES IN THEIR NORMAL OPERATING MODES.
RF SOURCE MINIMUM SAFE SEPARATION DISTANCE
AN/SPY-1D (HIGH POWER) 520 FEET
AN/SPY-1D (LOW POWER) 50 FEET
AN/SPG-62 (FCS MK 99) 1850 FEET
PHALANX (TRACK MODE) 135 FEET
(2) MAN ALOFT. THE 05 LEVEL AND ABOVE IS A MAN ALOFT AREA.
THE 04 LEVEL AND ABOVE, AFT OF THE AFT STACK, IS ALSO A MAN ALOFT
AREA. PROCEDURES SHALL BE ESTABLISHED TO ENSURE RADAR AND RADIO
TRANSMITTERS ARE SECURED WHILE MEN ARE ALOFT.
(3) WEATHER DECK.
(A) RF LEVELS EXCEEDING THE PEL EXIST ON THE 03 LEVEL
AFT OF THE AFT SPY-1D ARRAYS WITH THE EXCEPTION OF THE AREAS IN THE
IMMEDIATE VICINITY OF THE LADDERS UP TO THE 04 LEVEL AND DOWN TO THE
PORT SRBOC LAUNCHERS. THESE LADDERS AND THE IMMEDIATE VICINITY ARE
SAFE.
(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) AN/SPG-62 DIRECTOR NO. 3 SHOULD BE SECURED IF IT
IS NECESSARY TO PERFORM MAINTENANCE AT THE TOP OF THE CIWS RADOME.
(D) DURING HIGH POWER RADIATION TO ZENITH FROM THE AFT
SPY-1D ARRAYS, PERSONNEL SHOULD BE RESTRICTED FROM THE BRIDGE WING
AREA NEAR THE AFT ARRAYS (04 LEVEL BETWEEN FRAMES 160 AND 170).
ADDITIONALLY, PERSONNEL SHOULD NOT LEAN OVER THE BRIDGE WINGS ABOVE
THE ARRAYS.
(E) THE IN-PORT HERP PRECAUTIONS FOR HF ANTENNAS 2-1,
2-2, 2-3, 2-4 AND 2-5 DESCRIBED IN PARAGRAPHS 3.A.(5), (6), (7), (8)
AND (9) ARE ALSO APPLICABLE AT SEA.
(F) ALL OTHER MANNED WEATHER DECK AREAS ARE CONSIDERED
SAFE.
C. HERO PRECAUTIONS: THE FOLLOWING GUIDANCE IS FURNISHED WITH
THE UNDERSTANDING THAT SPECIFIC GUIDANCE MAY DIFFER FOR INDIVIDUAL
SHIPS BASED ON THE RESULTS OF THAT SHIP'S HERO SURVEY. REFER TO
SHIP'S HERO BILL AND REF C FOR SPECIFIC GUIDANCE.
(1) VERTREP OPERATIONS. MAINTAIN A MINIMUM SEPARATION
DISTANCE OF 50 FEET BETWEEN HERO SAFE ORDNANCE AND ANY RADIATING
ANTENNA. VERTREP HERO UNSAFE/HERO UNRELIABLE ORDNANCE IN CLOSED
METAL CONTAINERS. FOR HERO SUSCEPTIBLE ORDNANCE USE METAL CONTAINERS
OR APPLY HERO SEPARATION DISTANCES OF REF C.
(2) CONREP OPERATIONS. CONREP HERO UNSAFE/HERO UNRELIABLE
ORDNANCE IN CLOSED METAL CONTAINERS. FOR HERO SUSCEPTIBLE ORDNANCE
USE METAL CONTAINERS OR APPLY HERO SEPARATION DISTANCES OF REF C.
WHEN PHYSICAL CONTACT BETWEEN SHIPS HAS BEEN MADE USING METAL CABLES,
SILENCE ALL 2-32 MHZ ANTENNAS ON BOTH SHIPS WHEN HERO SUSCEPTIBLE
ORDNANCE IS ON A WEATHER DECK OF EITHER SHIP.
(3) OBSERVE HERO SEPARATION DISTANCES LISTED IN REF C FOR
PORTABLE RADIOS.
(4) IF HERO UNSAFE ORDNANCE IS EXPOSED ON THE WEATHER
DECKS SILENCE THE FOLLOWING TRANSMITTERS:
(A) ALL COMMUNICATIONS TRANSMITTERS EXCEPT
AN/URC-80(V)6, AN/URC-93, AN/GRC-211, AN/SRQ-4 AND AN/WSC-3 SATCOM.
(B) ALL RADAR TRANSMITTERS EXCEPT AN/SPS-64,
AN/SPS-67, IFF AND AN/URN-25.
(C) ALL AIRCRAFT TRANSMITTERS.
(5) IF AN/SSQ-53B OR AN/SSQ-62B SONOBUOYS ARE EXPOSED ON
THE FLIGHT DECK SECURE TRANSMISSION BY THE FOLLOWING
TRANSMITTERS/ANTENNAS:
(A) HF COMMUNICATIONS ANTENNAS 2-1, 2-2, 2-3, 2-4 AND
2-5 (MARS).
(B) AN/SPG-62 ANTENNA 8-3 (ILLUMINATOR NR. 3) AT
ELEVATIONS BELOW -5 DEGREES.
(C) ALL AIRCRAFT TRANSMITTERS.
(6) PHALANX AMMUNITION. WHEN HANDLING OR LOADING PHALANX
20MM LOOSE OR BARE ROUNDS, OR UNLOADING OR CLEARING THE GUN, SECURE
TRANSMISSION BY THE FOLLOWING TRANSMITTERS/ANTENNAS:
(A) HF COMMUNICATIONS ANTENNAS 2-1, 2-2, 2-3, 2-4 AND
2-5 (MARS) WITH THE FOLLOWING EXCEPTIONS: ANTENNA 2-3 CAN BE OPERATED
AT A MAXIMUM POWER OF 1000 WATTS AT 15-30 MHZ DURING OPERATIONS AT
MOUNTS 21 (FWD) AND 22 (AFT); AND ANTENNA 2-4 CAN BE OPERATED AT A
MAXIMUM POWER OF 1000 WATTS AT 6-30 MHZ DURING OPERATIONS AT MOUNT 21
ONLY.
(B) AN/SPG-62 ANTENNA 8-3 (ILLUMINATOR NR. 3) AT
ELEVATIONS BELOW -5 DEGREES DURING OPERATIONS AT MOUNT 22.
(C) ALL AIRCRAFT HF TRANSMITTERS.
THE HERO SEPARATION DISTANCE FOR AN/SPY-1D ILLUMINATION OF OTHER
SHIPS, WHEN THEY ARE HANDLING OR LOADING PHALANX 20 MM LOOSE OR BARE
ROUNDS, OR UNLOADING OR CLEARING THE GUN, IS 8170 FEET (HIGH POWER)
AND 2045 FEET (LOW POWER).
(7) 5 INCH, 54 CAL GUN AMMUNITION. THE MK 15 MODS 1 AND 4
PRIMERS ARE HERO SUSCEPTIBLE ORDNANCE UNLESS IN SEALED METAL
CONTAINERS OR MIL-B-131G STANDARD BARRIER BAGS. DURING PRESENCE AND
HANDLING ON THE WEATHER DECKS FORWARD, SECURE TRANSMISSION BY THE
FOLLOWING TRANSMITTERS/ANTENNAS - HF COMMUNICATIONS ANTENNAS 2-1,
2-2, 2-3, 2-4 AND 2-5 (MARS); AN/SPG-62 ANTENNA 8-1 (ILLUMINATOR
NR. 1) AT ELEVATIONS BELOW -5 DEGREES; AND AIRCRAFT HF TRANSMITTERS.
DURING PRESENCE AND HANDLING OF AMMUNITION AFT THE SAME HF ANTENNA
RESTRICTIONS APPLY, ALL AIRCRAFT TRANSMITTERS SHOULD BE SILENCED, AND
AN/SPG-62 ANTENNA 8-3 (ILLUMINATOR NR. 3) SHOULD BE SILENCED AT
ELEVATIONS BELOW -5 DEGREES.
(8) HELICOPTER OPERATIONS. IF OPERATIONS ON THE FLIGHT
DECK INVOLVE HANDLING OR LOADING OF HERO SUSCEPTIBLE ELECTRICAL
IMPULSE CARTRIDGES SECURE TRANSMISSION BY THE FOLLOWING
TRANSMITTERS/ANTENNAS - HF COMMUNICATIONS ANTENNAS 2-1, 2-2, 2-3, 2-4
AND 2-5 (MARS); AN/SPG-62 ANTENNA 8-3 (ILLUMINATOR NR. 3) AT
ELEVATIONS BELOW -5 DEGREES; AND ALL AIRCRAFT TRANSMITTERS. DO NOT
ILLUMINATE HELICOPTERS IN FLIGHT OR DURING TAKEOFF OR LANDING, WITH
THE AN/SPY-1D RADAR IF WITHIN 2135 FEET OF THE SHIP WHEN OPERATING AT
HIGH POWER OR 525 FEET WHEN OPERATING AT LOW POWER; OR WITH THE MAIN
BEAM OF THE AN/SPG-62 RADARS IF WITHIN 1850 FEET (HERP SAFE DISTANCE)
OF THE SHIP.
4. ADDITIONAL HERP/HERO/EMI PRECAUTIONS DURING HELICOPTER OPERATIONS
ARE ADDRESSED IN REF D.
5. RF BURN. HF TRANSMITTING ANTENNA 2-1 CAUSES RF BURN HAZARDS
DURING OPERATIONS WITH THE FORWARD VLS STRIKEDOWN CRANE AND SHOULD
BE SECURED DURING THESE OPERATIONS. ANTENNAS 2-2 AND 2-4 CAUSE RF
BURN HAZARDS DURING OPERATIONS WITH THE AFT VLS STRIKEDOWN CRANE AND
SHOULD BE SECURED DURING THESE OPERATIONS. ANTENNA 2-2 CAUSES A RF
BURN HAZARD ON THE RIB AND RIB CRANE WHEN TRANSMITTING AT FREQUENCIES
BETWEEN 7 MHZ AND 9 MHZ. TRANSMISSION FROM ANTENNA 2-2 BETWEEN THESE
FREQUENCIES SHOULD BE PROHIBITED DURING OPERATIONS WITH THE RIB.
6. HERF - THERE ARE NO SPECIAL HERF EMCON RESTRICTIONS DURING
REFUELING WITH JP-5. EXISTING HERP, HERO AND EMI RESTRICTIONS APPLY
IF APPROPRIATE.
7. FOR COMNAVSURFLANT/COMNAVSURFPAC - RECOMMEND THAT DDG 51 CLASS
SHIPS BE TASKED TO ADHERE TO THE PROVISIONS OF PARA 3 AND 5 ABOVE.
8. FOR SUPSHIP BATH/PASCAGOULA - ENSURE THAT GUIDANCE PROVIDED IN
PARA 3 AND 5 IS ADHERED TO ON AVAILABLE DDGS DURING PSA OR PRIOR TO
DELIVERY/SAILAWAY.
9. THIS INFORMATION WILL BE INCLUDED IN THE AEGIS CSTOM.
APPROPRIATE INFORMATION WILL ALSO BE INCLUDED IN CSOSS. THIS
ADVISORY HAS NO IMPACT ON EOSS, PMS, FMP OR TECHNICAL DOCUMENTATION.
10. ORIG POC IS MR. N. S. SMITHSON, PMS400F511, DSN: 332-5981 (EXT
133) OR COMM (703) 602-5981. TPOC IS MR. M. D. BARE, NSWCDD, DSN:
249-7832 OR COMM (703) 663-7832.//
DDG-51