ADMINISTRATIVE MESSAGE
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R 171754Z JUN 97 ZYB PSN 667882L37
FM PEO SC-AP WASHINGTON DC//PMS400F//
TO COMNAVSURFLANT NORFOLK VA//N6/N8/N43/N431A6//
COMNAVSURFPAC SAN DIEGO CA//N8/N43/N43111//
SUPSHIP BATH ME//150//
SUPSHIP PASCAGOULA MS//150//
AIG ONE THREE EIGHT SIX ONE
INFO COMNAVAIRSYSCOM WASHINGTON DC//JJJ//
AEGIS TRAREDCEN DAHLGREN VA//00/N31/N32/N33/N42//
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***THIS IS A 4 PART MSG COLLATED BY MDU***
UNCLAS //N08272//ACTION ADDEES OF AIG 13861 TAKE FOR INFO ONLY//
MSGID/GENADMIN/PEO SC-AP//
SUBJ/DDG 51 CLASS ADVISORY NR. 04-97, HERP-HERO GUIDANCE//
REF/A/RMG/AEGIS PROG MGR/241400ZFEB94//
REF/B/DOC/DOD/-//
REF/C/RMG/AEGIS PROG MGR/271410ZMAR92//
REF/D/DOC/NAVSEA/-//
REF/E/RMG/PEO SC-AP/171755ZJUN97//
NARR/REF A IS DDG 51 CLASS ADVISORY NR. 08-91 REV 3. REF B IS
DODINST 6055.11. REF C IS DDG 51 CLASS ADVISORY NR. C001-92. REF D
IS OP 3565, VOL II, PART 1, SIXTH REVISION. REF E IS DDG 51 CLASS
ADVISORY NR. C001-97.//
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 SUPERSEDES AND CANCELS REF A. IT INCORPORATES THE FOLLOWING
CHANGES TO REF A:
A. REF B HAS BEEN REVISED TO CHANGE THE PERMISSIBLE EXPOSURE
LIMIT (PEL) FOR CERTAIN RADAR FREQUENCIES, AND TO REDEFINE RF
ENVIRONMENTS AS CONTROLLED AND UNCONTROLLED. NSWCDD HAS RECALCULATED
THE HERP SAFE DISTANCES FOR RADARS BASED ON THE REVISED PELS AND THE
MOST CURRENT INFORMATION ON RADAR CHARACTERISTICS. THESE
RECALCULATED HERP SAFE DISTANCES HAVE BEEN SUBMITTED FOR INCLUSION IN
AN UPDATE TO OP 3565 VOLUME 1. REF B HAS ALSO INVOKED PELS FOR
INDUCED CURRENTS AND CONTACT CURRENTS. THIS ADVISORY REFLECTS THOSE
CHANGES BY CHANGING THE HERP SAFE DISTANCE FOR SOME RADARS, AND BY
INCORPORATING THE RESULTS OF A HERP SURVEY ON DDG 69. THE HERP
SURVEY ON DDG 69 WAS CONDUCTED TO THE REVISED CRITERIA OF REF B.
B. A HERP SAFE DISTANCE FOR THE SPY BURNTHROUGH MODE IS ADDED.
C. THE GUIDANCE ON SPY RADIATION IN PORT IS CLARIFIED.
(1) IT HAS BEEN DETERMINED THAT IT IS NOT NECESSARY TO HAVE
TRANSMITTER QUADRATURE ALIGNMENT WITHIN PMS LIMITS IN ORDER TO SAFELY
RADIATE TOWARD ZENITH. THAT REQUIREMENT HAS BEEN DELETED.
(2) NEW SPY COMPUTER PROGRAM INPORT RADIATION PATCH SETS
(HIGH POWER PATCH SET AND LOW POWER PATCH SET) ARE BEING PROVIDED
WITH NEW COMPUTER PROGRAM DELIVERIES. THESE PATCHES CLAMP RADIATION
AT 75 DEGREES ELEVATION. SPY HIGH POWER REMOTE OPERATION INPORT IS
ALLOWED WHEN THE NEW HIGH POWER PATCH SET IS USED. CHECK YOUR
COMPUTER PROGRAM DESCRIPTION DOCUMENT TO DETERMINE IF YOU HAVE THE
NEW INPORT RADIATION PATCH SETS.
(3) A CAUTION TO CHECK WITH PORT AUTHORITIES BEFORE SPY LOW
POWER RADIATION IN PORT (WITHOUT USING THE NEW LOW POWER PATCH SET)
IS ADDED.
D. THE PERSONNEL RESTRICTIONS IN THE BRIDGE WING AREA DUE TO
YARDARM REFLECTIONS DURING SPY HIGH POWER RADIATION TO ZENITH ARE
DELETED, BECAUSE BUMED HAS DETERMINED THAT THE LOCALIZED HOT SPOTS
ARE NOT A HAZARD.
E. GUIDANCE ON THE AN/USC-38 EHF SATCOM IS ADDED.
F. HERO GUIDANCE IS ADDED FOR THE HARPOON MISSILE.
G. OTHER HERO GUIDANCE IS MODIFIED BASED ON RECENT HERO SURVEYS
OF DDG 51 CLASS DESTROYERS.
NOTE: THIS IS INTENDED TO BE THE LAST ISSUE OF THIS CLASS
ADVISORY IN ITS CURRENT FORM. THE INFORMATION IN THIS CLASS ADVISORY
WILL BE INCORPORATED INTO THE CSOSS MASTER PROCEDURE, MP6/CS "MASTER
RADHAZ MANAGEMENT CHECKLIST", WHOSE FORMAT ALLOWS THIS INFORMATION TO
BE PRESENTED IN A MORE UNDERSTANDABLE MANNER. FUTURE ISSUES OF THIS
CLASS ADVISORY WILL CONTAIN ONLY NEW OR UPDATED INFORMATION WHICH IS
NOT IN THE CURRENT ISSUE OF CSOSS ISSUED TO EVERY SHIP OF THE CLASS.
2. BACKGROUND. DDG 51 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 FOR CONTROLLED ENVIRONMENTS AND FOR UNCONTROLLED
ENVIRONMENTS. THE WEATHER DECK AREA OF THE SHIP IS CONSIDERED A
CONTROLLED ENVIRONMENT. INPORT, THE AREA BEYOND THE WEATHER DECK IS
CONSIDERED AN UNCONTROLLED ENVIRONMENT. PELS FOR CONTROLLED
ENVIRONMENTS ARE THE BASIS FOR THE HERP GUIDANCE AND SAFE SEPARATION
DISTANCES USED IN THIS ADVISORY, EXCEPT FOR THOSE RADARS WHOSE SAFE
SEPARATION DISTANCES EXTEND BEYOND THE BOUNDARIES OF THE SHIP. FOR
THOSE RADARS THE PELS FOR UNCONTROLLED ENVIRONMENTS ARE THE BASIS FOR
INPORT SAFE SEPARATION DISTANCES. SOME ELEMENTS OF ORDNANCE USED IN
DDG 51 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-1D. HIGH POWER RADIATION IN PORT IS PERMITTED
ONLY TOWARD THE ZENITH. HIGH POWER RADIATION IN PORT MAY BE
PERFORMED ONLY WHEN THE TRANSMITTER IS IN MAINTENANCE MODE UNDER
LOCAL CONTROL, OR WHEN IN REMOTE CONTROL AND THE NEW HIGH POWER PATCH
SET IS USED TO CLAMP RADIATION AT 75 DEGREES IN ELEVATION.
ADDITIONALLY, SHIPS WHICH DO NOT HAVE THE NEW INPORT RADIATION PATCH
SETS MAY PERFORM HIGH POWER RADIATION IN PORT FOR THE FOLLOWING TESTS
USING THE PROCEDURE SPECIFIED BELOW:
(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
TO PLACE THE BEAM AT THE ZENITH. (NOTE: THESE PROCEDURES MUST BE
FOLLOWED REGARDLESS OF WHETHER AT-SEA OR IN-PORT DISK SETS ARE USED)
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) VERIFY NO SECTORS OR RADIATION CONTROL
REGIONS.
(B) PLACE SEARCH ELEVATION TO ZERO DEGREES.
(C) HORIZON SEARCH OFF.
(D) SEARCH MODE NORMAL.
(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 IN MAINTENANCE MODE UNDER LOCAL CONTROL, IN
REMOTE CONTROL WHEN USING THE NEW HIGH POWER PATCH SET, OR USING THE
ABOVE PROCEDURE ALLOWS RADIATION ONLY TOWARD THE ZENITH POSITION.
FOR THESE OPERATIONS THE HAZARDOUS ZONE IS BOUNDED BY THE BOTTOM OF
THE ARRAY, 10 FEET TO EACH SIDE OF THE ARRAY CENTERLINE, OUT TO A
DISTANCE OF 10 FEET IN FRONT OF THE ARRAY AND 350 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 10 FEET
ABOVE THE ARRAY. PERSONNEL SHOULD NOT WORK ON YARDARMS OR IN CRANES
AND OTHER SHIPYARD EQUIPMENT DIRECTLY ABOVE THE ARRAYS WHEN THEY ARE
RADIATING. PERSONNEL MUST BE WARNED NOT TO LEAN OVER RAILS ABOVE THE
ARRAY FACES.
LOW POWER RADIATION IN PORT IS PERMITTED WHEN USING THE NEW LOW
POWER PATCH SET TO CLAMP RADIATION AT 75 DEGREES IN ELEVATION. IF
LOW POWER RADIATION IN PORT IS PLANNED WITHOUT USING THE NEW INPORT
RADIATION PATCH SET, RADIATION MUST BE RESTRICTED TO CLEAR SECTORS.
AUTHORIZATION FROM THE LOCAL AREA AUTHORITY AND FREQUENCY COORDINATOR
IS REQUIRED. DURING SEARCH AND TRACK OPERATIONS IN LOW POWER IN
PORT, THE MINIMUM SAFE SEPARATION BETWEEN THE AN/SPY-1D ARRAYS AND
PERSONNEL IS 238 FEET. (NOTE: REGARDLESS OF THE SEARCH SECTOR POWER
CONTROL, AN/SPY-1D MAY AUTOMATICALLY EMIT HIGH POWER TRACK DWELLS.
IN ORDER TO PREVENT THE EMISSION OF HIGH POWER TRACK DWELLS WHILE IN
LOW POWER, SHIPS CAN USE LOW POWER RADIATION CONTROL REGIONS. 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.)
REF C PROVIDES GUIDANCE FOR OPERATION OF AN/SPY-1D TO PRECLUDE
OFFSHIP AN/SLQ-32 COMPONENT DAMAGE.
(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 1415 FEET.
(3) AN/SLQ-32(V)2 (DDG 51-67). THE AN/SLQ-32(V)2 DOES NOT
RADIATE RF ENERGY. NO HERP/HERO PRECAUTIONS ARE REQUIRED.
(4) AN/SLQ-32(V)3 (DDG 68 AND FOLLOW). IN PORT,
AN/SLQ-32(V)3 SHALL BE ALLOWED TO RADIATE ONLY TO CLEAR AREAS AS
AUTHORIZED BY THE COGNIZANT PORT AUTHORITY. THE MINIMUM SAFE
SEPARATION DISTANCE IS 150 FEET.
(5) 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
125 FEET.
(6) OE-409/SRC TWIN FAN ANTENNAS (ANTENNA 2-1). PELS FOR
CONTACT CURRENT AND RF VOLTAGE ARE EXCEEDED AT THE FORWARD VLS
STRIKEDOWN CRANE. THE TRANSMITTER OUTPUT POWER ON ANTENNA 2-1 SHOULD
BE LIMITED TO 110 WATTS DURING FORWARD VLS CRANE OPERATIONS. THE
ANTENNA WIRES AT THE 05 LEVEL PRESENT A SEVERE RF BURN HAZARD IF
TOUCHED.
(7) OE-415(V)1/SRC TWIN WHIP ANTENNAS (ANTENNA 2-2). THE
PEL FOR CONTACT CURRENT IS EXCEEDED AT THE RIB CRANE HOOK AND AT THE
STANCHION ON THE INBOARD SIDE OF THE RIB. THE PEL FOR RF VOLTAGE IS
EXCEEDED AT THE RIB CRANE HOOK. THE TRANSMITTER OUTPUT POWER ON
ANTENNA 2-2 SHOULD BE LIMITED TO 160 WATTS BETWEEN FREQUENCIES OF 5.5
MHZ AND 9.5 MHZ WHEN THE RIBS ARE MANNED. PELS FOR CONTACT CURRENT
AND RF VOLTAGE ARE EXCEEDED AT THE AFT VLS STRIKEDOWN CRANE DURING
TRANSMISSION BY ANTENNA 2-2. THE TRANSMITTER OUTPUT POWER SHOULD BE
LIMITED TO 60 WATTS DURING AFT VLS CRANE OPERATIONS. ADDITIONALLY
TRANSMISSION FROM ANTENNA 2-2 SHOULD BE SECURED BEFORE PERSONNEL
ENTER THE AREA OF THE ANTENNA MAINTENANCE PLATFORM.
(8) OE-418(V)1/SRC TWIN WHIP ANTENNAS (ANTENNA 2-3). PELS
FOR CONTACT CURRENT AND RF VOLTAGE CAN BE EXCEEDED AT VARIOUS
METALLIC STRUCTURES IN THE VICINITY OF ANTENNA 2-3 WHEN IT IS
TRANSMITTING. THE OUTPUT POWER SHOULD BE LIMITED TO 650 WATTS WHEN
OPERATING BETWEEN FREQUENCIES OF 17.5 MHZ AND 22.5 MHZ, AND TO 250
WATTS WHEN OPERATING BETWEEN FREQUENCIES OF 22.5 MHZ AND 30 MHZ.
(9) OE-417/SRC EMERGENCY TILTING WHIP ANTENNA (ANTENNA 2-4).
THE 35-FOOT SINGLE WHIP EMERGENCY ANTENNA CAN PRODUCE RF LEVELS THAT
EXCEED THE PELS FOR POWER DENSITY, INDUCED CURRENT, CONTACT CURRENT,
AND RF VOLTAGE. THE PORT 02 LEVEL BETWEEN FRAMES 248 AND 312 SHOULD
NOT BE ENTERED WHEN ANTENNA 2-4 IS OPERATED. TEMPORARY WARNING SIGNS
SHOULD BE INSTALLED AT ACCESSES TO THIS AREA BEFORE OPERATION OF
ANTENNA 2-4. THE TRANSMITTER OUTPUT POWER ON ANTENNA 2-4 SHOULD BE
LIMITED TO 80 WATTS DURING AFT VLS STRIKEDOWN CRANE OPERATIONS.
(10) AS-3771/U WHIP MARS ANTENNA (ANTENNA 2-5). THE
INSTALLATION OF MARS SYSTEMS CAN CREATE A HERP CONDITION. DUE TO THE
MANY TYPES OF ANTENNAS AND TRANSMITTERS AVAILABLE FOR MARS, A RADHAZ
SURVEY SHOULD BE CONDUCTED UPON INSTALLATION OR CHANGEOUT OF
EQUIPMENT TO ENSURE THAT NO HERP CONDITIONS ARE CREATED BY THE
INSTALLATION/CHANGEOUT.
(11) AN/WSC-3 SATCOM (ANTENNAS 3-10A AND 3-10B). THESE
ANTENNAS ARE IN A RADHAZ AREA AND WILL NOT PRODUCE RF LEVELS
EXCEEDING THE PEL IN ANY NORMALLY OCCUPIABLE AREA INCLUDING THE
BRIDGE WINGS. THE MAIN BEAM SAFE SEPARATION DISTANCE IS 23 FEET.
(12) 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 50
FEET.
(13) INMARSAT MX 2400 AND SATURN 3S.90 INTEGRATED SATCOM
TERMINAL. INMARSAT CAN PRODUCE RF LEVELS EXCEEDING THE PEL OUT TO
NINE 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.
(14) AN/USC-38 EHF SATCOM. EHF SATCOM SHALL BE ALLOWED TO
RADIATE ONLY TO CLEAR AREAS. 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 305 FEET.
EHF SATCOM WILL NOT CREATE RF LEVELS EXCEEDING THE PEL IN ANY
NORMALLY OCCUPIED AREA, INCLUDING THE BRIDGE WINGS AND SIGNAL
PLATFORMS.
(15) 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 DEFINED RADHAZ AREAS.
(16) 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 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 (BURNTHROUGH) 540 FEET
AN/SPY-1D (HIGH POWER) 360 FEET
AN/SPY-1D (LOW POWER) 50 FEET
AN/SPG-62 (FCS MK 99) 1160 FEET
PHALANX 115 FEET
AN/USC-38 EHF SATCOM 305 FEET
AN/SLQ-32(V)3 95 FEET
(2) RADHAZ AREAS. THE 05 LEVEL AND ABOVE IS A RADHAZ AREA.
THE 04 LEVEL AND ABOVE, AFT OF THE AFT STACK, IS ALSO A RADHAZ 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. HOWEVER, THE AREAS ON THE 03 LEVEL IN
THE IMMEDIATE VICINITY OF THE LADDERS UP TO THE 04 LEVEL AND DOWN TO
THE PORT SRBOC LAUNCHERS, AND THE 02 LEVEL SRBOC LAUNCHER AREAS ARE
SAFE.
(B) PERSONNEL SHOULD NOT LEAN OVER THE BRIDGE WINGS
ABOVE THE SPY-1D ARRAYS.
(C) 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.
(D) AN/SPG-62 DIRECTOR NO. 3 SHOULD BE SECURED IF IT IS
NECESSARY TO PERFORM MAINTENANCE AT THE TOP OF THE CIWS RADOME.
(E) RIB STATION. REFER TO THE IN-PORT HERP PRECAUTIONS
FOR HF ANTENNA 2-2 IN PARA 3.A.(7) ABOVE.
(F) VLS STRIKEDOWN CRANES. REFER TO THE IN-PORT HERP
PRECAUTIONS FOR HF ANTENNAS 2-1, 2-2 AND 2-4 IN PARAS 3.A.(6), (7),
AND (9) ABOVE.
(G) THE IN-PORT HERP PRECAUTIONS FOR HF ANTENNAS 2-1,
2-2, 2-3, 2-4, AND 2-5 DESCRIBED IN PARAGRAPHS 3.A(6), (7), (8), (9)
AND (10) ARE ALSO APPLICABLE AT SEA.
(H) 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 D 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 D.
(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 D.
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. SILENCE FIRE CONTROL
RADAR SYSTEMS THAT CAN DIRECTLY ILLUMINATE THESE OPERATIONS ON EITHER
SHIP.
(3) OBSERVE HERO SEPARATION DISTANCES LISTED IN REF D 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/USC-38, INMARSAT, AND
AN/WSC-3 SATCOM/LOS.
(B) ALL RADAR TRANSMITTERS EXCEPT AN/SPS-64, AN/SPS-67,
IFF, AN/URN-25 AND AN/SRQ-4.
(C) ALL AIRCRAFT TRANSMITTERS.
(5) PHALANX AMMUNITION. WHEN HANDLING PHALANX 20MM LOOSE
OR BARE ROUNDS (E.G., DURING HANDLING, UNLOADING OR CLEARING THE
GUN), CONTROL TRANSMISSION BY THE FOLLOWING TRANSMITTERS/ANTENNAS:
(A) SECURE TRANSMISSION BY HF COMMUNICATIONS ANTENNAS
2-1, 2-2, 2-3, 2-4 AND 2-5 (MARS) WITH THE FOLLOWING EXCEPTION:
FOR THE PRESENCE, HANDLING, AND LOADING OF PHALANX AMMUNITION LINKED
ROUNDS WITH RADHAZ SHIELDS OR FLEXIBLE CHUTES AT LOCATIONS IN
PROXIMITY TO CIWS MOUNT 22 OR CIWS AMMUNITION TRUNK (03-300-2-Q),
SILENCE HF COMMUNICATION ANTENNA 2-4 ONLY.
(B) SECURE ALL AIRCRAFT HF TRANSMITTERS EXCEPT UHF/VHF
COMMUNICATIONS LESS THAN 40 WATTS (E.G., AN/ARC-159(V)).
(C) LIMIT AN/SPY-1D TO LOW POWER.
(D) SILENCE AN/SPG-62 ANTENNA 8-3 (ILLUMINATOR NR. 3) AT
ELEVATIONS BELOW -5 DEGREES DURING OPERATIONS AT MOUNT 22.
(E) LIVE ROUNDS IN THE DRUM AND FEED CHUTE DO NOT REQUIRE
EMCON.
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).
(6) 5 INCH, 54 CAL GUN AMMUNITION. THE MK 15 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, SECURE TRANSMISSION BY THE FOLLOWING TRANSMITTERS/
ANTENNAS - HF COMMUNICATIONS ANTENNAS 2-1, 2-2, 2-3, 2-4 AND 2-5
(MARS); AND ALL AIRCRAFT TRANSMITTERS EXCEPT UHF/VHF COMMUNICATIONS
LESS THAN 40 WATTS (E.G., AN/ARC-159(V)). DURING PRESENCE AND
HANDLING ON THE FORWARD WEATHER DECKS LIMIT THE FORWARD SPY-1D ARRAYS
TO LOW POWER AND SILENCE ANTENNA 8-1 (ILLUMINATOR NR. 1) AT
ELEVATIONS BELOW -5 DEGREES, AND DURING PRESENCE AND HANDLING ON THE
AFT WEATHER DECKS LIMIT THE AFT SPY-1D ARRAYS TO LOW POWER AND
SILENCE AN/SPG-62 ANTENNA 8-3 (ILLUMINATOR NR. 3) AT ELEVATIONS
BELOW -5 DEGREES.
(7) HARPOON. HARPOON VARIANTS NOT LISTED IN REF D ARE
CONSIDERED HERO-SUSCEPTIBLE DURING PMS PROCEDURES AND CONNECTING/
ISCONNECTING CABLES. DURING THESE OPERATIONS SECURE TRANSMISSION BY
THE FOLLOWING TRANSMITTERS/ANTENNAS:
(A) HF COMMUNICATIONS ANTENNAS 2-1, 2-2, 2-3, 2-4, AND
2-5 (MARS).
(B) ALL AIRCRAFT TRANSMITTERS EXCEPT UHF/VHF
COMMUNICATIONS LESS THAN 40 WATTS (E.G., AN/ARC-159(V)).
FOR PRESENCE OF A MISSILE IN THE CANISTER, HF ANTENNA 2-4
SHOULD NOT TRANSMIT AT A POWER GREATER THAN 300 WATTS.
(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:
(A) HF COMMUNICATIONS ANTENNAS 2-1, 2-2, 2-3, 2-4, AND
2-5 (MARS).
(B) ALL AIRCRAFT TRANSMITTERS.
(C) AN/SPG-62 ANTENNA 8-3 (ILLUMINATOR NR. 3) AT
ELEVATIONS BELOW -5 DEGREES.
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 1160 FEET
(HERP SAFE DISTANCE) OF THE SHIP.
4. ADDITIONAL HERP/HERO/EMI PRECAUTIONS DURING HELICOPTER OPERATIONS
ARE ADDRESSED IN REF E.
5. HERF. THERE ARE NO SPECIAL HERF EMCON RESTRICTIONS DURING
REFUELING WITH JP-5. EXISTING HERP, HERO AND EMI RESTRICTIONS APPLY
IF APPROPRIATE.
6. FOR COMNAVSURFLANT/COMNAVSURFPAC - RECOMMEND THAT DDG 51 CLASS
SHIPS BE TASKED TO ADHERE TO THE PROVISIONS OF PARA 3 ABOVE.
7. FOR SUPSHIP BATH/PASCAGOULA - ENSURE THAT GUIDANCE PROVIDED IN
PARA 3 IS ADHERED TO ON AVAILABLE DDGS DURING PSA OR PRIOR TO
DELIVERY/SAILAWAY.
8. THIS INFORMATION WILL BE INCLUDED IN THE AEGIS CSOSS. THIS
ADVISORY HAS NO IMPACT ON EOSS, PMS FMP OR TECHNICAL DOCUMENTATION.
9. ORIG POC IS MR. N. S. SMITHSON, PMS 400F51H, DSN:332-5981
(EXT 133) OR COMM (703) 602-5981. TPOC IS MR. M. D. BARE, NSWCDD,
DSN:249-7832 OR COMM (540) 653-7832.//
BT
DDG-51