REFERENCES:

A. NAVEDTRA 12043, BASIC MILITARY REQUIREMENTS
B. THE BLUEJACKETS' MANUAL
C. NWP 42, SHIPBOARD OPERATING HELICOPTER PROCEDURES
D. NAVEDTRA 12000, AIRMAN
E. NAVEDTRA 10335, AVIATION BOATSWAIN'S MATE H 3

105.1 DISCUSS THE FOLLOWING SHIPBOARD DRILLS/BILLS:

A. GENERAL QUARTERS (GQ) - A CONDITION OF MAXIMUM READINESS FOR COMBAT, WITH THE CREW AT BATTLE STATIONS. WILL BE PRECEDED BY GENERAL QUARTERS ALARM.

B. FIRE - SIGNALLED TWICE BY A RAPID RINGING OF THE SHIP'S BELL, FOLLOWED BY ONE STROKE IF FORWARD, TWO STROKES IF AMIDSHIP AND THREE IF AFT. THE BELLS ARE IMMEDIATELY FOLLOWED BY AN ANNOUNCEMENT "FIRE, FIRE, FIRE" PASSED OVER THE GENERAL ANNOUNCING SYSTEM (1-MC), GIVING COMPARTMENT LOCATION, FOLLOWED BY A CLASS OF FIRE AND ASSIGNMENT OF THE REPAIR PARTY TO RESPOND.

C. FLOODING - SIGNALLED TWICE BY A RAPID RINGING OF THE SHIP'S BELL, FOLLOWED BY ONE STROKE IF FORWARD, TWO STROKES IF AMIDSHIP AND THREE IF AFT. THE BELLS ARE IMMEDIATELY FOLLOWED BY AN ANNOUNCEMENT "FLOODING, FLOODING, FLOODING" PASSED OVER THE GENERAL ANNOUNCING SYSTEM (1-MC), GIVING COMPARTMENT LOCATION, AND ASSIGNMENT OF THE REPAIR PARTY TO RESPOND.

D. SECURITY - TO PROVIDE FOR THE PARTICULAR SECURITY MEASURES REQUIRED BY NUCLEAR CAPABLE SHIPS. THE PROCEDURES AND RESPONSIBILITIES IN THIS BILL AND IN ADDITION TO THE GENERAL SHIPBOARD SECURITY MEASURES PROVIDED ELSEWHERE - SUCH AS SOUNDING AND SECURITY PATROLS, BOW AND STERN SENTRIES, AND THE GANGWAY WATCH. THE SECURITY OFFICER (OR WEAPONS OFFICER, IF NONE ASSIGNED) IS RESPONSIBLE.

E. NAVIGATION - THIS BILL, THE RESPONSIBILITY OF THE NAVIGATOR, PRESCRIBES UNIFORM RESPONSIBILITIES AND PROCEDURES FOR THE SAFE NAVIGATION OF THE SHIP, INCLUDING NAVIGATION IN RESTRICTED WATER UNDER CONDITIONS OF LOW VISIBILITY. IT SHOULD BE NOTED THAT THE SAFE NAVIGATION OF THE SHIP ULTIMATELY RESTS WITH THE COMMANDING OFFICER.

F. CASUALTY - AN EVENT OR SERIES OF EVENTS IN PROGRESS DURING WHICH EQUIPMENT DAMAGE AND/OR PERSONNEL INJURY HAS ALREADY OCCURRED. THE NATURE AND SPEED OF THESE EVENTS ARE SUCH THAT PROPER AND CORRECT PROCEDURAL STEPS WILL ONLY SERVE TO LIMIT EQUIPMENT DAMAGE AND/OR PERSONNEL INJURY. A CASUALTY DRILL IS USED TO TRAIN SHIPS PERSONNEL TO THINK, ACT, AND WORK TOGETHER IN CONTROLLING CASUALTIES.

G. RESCUE AND ASSISTANCE - IT IS THROUGH THIS BILL THAT THE DCA, ENGINEER OFFICER UNDER THE XO, PROVIDES FOR A SPECIAL ORGANIZATION OF QUALIFIED PERSONNEL WITHIN EACH DUTY SECTION TO RENDER EMERGENCY ASSISTANCE TO PERSONS OR ACTIVITIES OUTSIDE THE UNIT, WITHOUT LOWERING THE UNIT'S OWN SECURITY STANDARDS. IT IS THE BILL THAT ALSO PRESCRIBES THE PROCEDURES FOR RECOVERING ONE OR MORE PERSONS FROM THE WATER.

H. ABANDON SHIP - ONLY THE COMMANDING OFFICER OR THE SENIOR LINE OFFICER CAN ORDER THE SHIP ABANDONED AND HE WILL ONLY DO SO AFTER ALL EFFORTS TO SAVE THE SHIP PROVE FUTILE. WORD WILL BE PASSED ON BEARING AND DISTANCE TO NEAREST LAND, FRIENDLY OR ENEMY, SEA AND WIND CONDITIONS AND WATER TEMPERATURE.

I. MAN OVERBOARD - THE MAN OVERBOARD BILL IS CONCERNED WITH THE RECOVERY OF ONE PERSON OR A SMALL NUMBER OF PEOPLE FROM THE WATER. THE ALARM "MAN OVERBOARD, PORT (STARBOARD) SIDE" IS PASSED OVER THE 1-MC TWICE, IN ADDITION, THE SHIP LOSING THE PERSON SOUNDS SIX SHORT BLASTS ON THE SHIP'S WHISTLE. IMMEDIATELY WHEN MAN OVERBOARD IS SOUNDED ALL HANDS ARE REQUIRED TO MAKE A FACE TO FACE COMPLETE AND ACCURATE MUSTER TO IDENTIFY THE MISSING CREWMAN.

J. AIRCRAFT CRASH AND RESCUE - THE WORD IS PASSED OVER THE 1-MC AS APPROPRIATE, "PLANE CRASH, PORT SIDE," "AWAY THE RESCUE AND ASSISTANCE DETAIL, RESCUE SURVIVORS."

K. BARRICADE - BARRICADES ARE THAT PART OF THE EMERGENCY RECOVERY EQUIPMENT USED FOR THE EMERGENCY ARRESTMENT OF AIRCRAFT THAT, BECAUSE OF BATTLE DAMAGE, TAILHOOK OR OTHER MECHANICAL FAILURE, CANNOT MAKE A NORMAL (PENDENT) ARRESTED LANDING.

105.2 DESCRIBE AND STATE THE DIFFERENCES BETWEEN THE FOLLOWING. (REF. A)

A. GENERAL ALARM - THE SOUND OF THE GENERAL ALARM IS A SERIES OF SINGLE GONG TONES. BEFORE THE ALARM IS SOUNDED, WORD IS PASSED FOR ALL HANDS TO MAN THEIR BATTLE STATIONS, AND THE TYPE OF EMERGENCY IS IDENTIFIED. THE GENERAL ALARM IS SOUNDED (PRECEDED BY THE APPROPRIATE WORD) FOR GENERAL QUARTERS (ACTION AGAINST THE ENEMY), FIRE, CHEMICAL WARFARE (CW), BIOLOGICAL WARFARE (BW), AND NUCLEAR WEAPON ATTACK. MATERIAL CONDITION ZEBRA IS SET.

B. CHEMICAL ALARM - THE CHEMICAL ALARM IS A STEADY TONE SIGNAL OF 1000 HERTZ. IT IS SOUNDED WHEN A CHEMICAL WARFARE, BIOLOGICAL WARFARE, OR NUCLEAR WEAPON ATTACK IS DETECTED, WHETHER THE SHIP IS AT GENERAL QUARTERS OR NOT. ON SOUNDING THE CHEMICAL ALARM, ZEBRA IS SET (IF NOT ALREADY AT GENERAL QUARTERS) AND CIRCLE WILLIAM FITTINGS ARE CLOSED.

C. COLLISION ALARM - THE COLLISION ALARM TAKES PRECEDENCE OVER AND OVERRIDES ANY OTHER ALARM BEING SOUNDED. IT HAS THE SAME TONE AS THE CHEMICAL ALARM, BUT INSTEAD OF A STEADY TONE, THE COLLISION ALARM CONSISTS OF A SERIES OF THREE PULSES, WITH A SHORT PAUSE BETWEEN EACH SERIES. MATERIAL CONDITION ZEBRA IS SET UPON SOUNDING OF THE ALARM.

105.3 STATE THE TRAFFIC FLOW PATTERN DURING SETTING OF GQ. (REF B)

UP AND FORWARD ON THE STARBOARD SIDE; DOWN AND AFT ON THE PORT SIDE.

105.4 LIST THE SHIPBOARD REPAIR LOCKERS AND IDENTIFY WHICH LOCKERS ARE APPLICABLE TO AVIATION SHIPS. (REF A)

REPAIR PARTY LOCATION OR FUNCTION
REPAIR 1 MAIN DECK
REPAIR 2 FORWARD
REPAIR 3 AFT
REPAIR 4 AMIDSHIPS
REPAIR 5 PROPULSION
REPAIR 6 ORDNANCE
REPAIR 7 GALLEY DECK AND ISLAND STRUCTURE
REPAIR 8 ELECTRONICS

ADDITIONALLY, AIRCRAFT CARRIERS AND SHIPS EQUIPPED FOR HELICOPTER OPERATIONS HAVE AVIATION FUEL REPAIR AND CRASH AND SALVAGE TEAMS. CARRIERS ALSO HAVE AN ORDNANCE DISPOSAL TEAM. THERE IS ALSO AN ELECTRONICS CASUALTY CONTROL TEAM ASSIGNED ABOARD SOME SHIPS.

105.5 STATE THE SHIPBOARD LIGHT SIGNAL METHOD FOR MAN OVERBOARD (DAY/NIGHT). (REF. B)

A. DAY - THE MAN OVERBOARD FLAG IS THE OSCAR FLAG DISPLAYED AT THE FORETRUNK OR WHERE IT CAN BE BEST SEEN DURING DAYLIGHT HOURS AND THE SHIP LOSING THE PERSON SOUNDS SIX SHORT BLASTS ON THE SHIP'S WHISTLE.

B. NIGHT - THE SHIP LOSING THE MAN OVERBOARD DISPLAYS TWO BLINKING RED LIGHTS ARRANGED VERTICALLY AND SOUNDS SIX SHORT BLASTS FROM THE SHIP'S WHISTLE.

105.6 DESCRIBE THE FOLLOWING MAN OVERBOARD RECOVERY PROCEDURES: (REFS. A, C)

A. HELICOPTER - EXPEDITIOUS AND RELIABLE. A RESCUE SWIMMER SHALL ENTER THE WATER AND ASSIST THE SURVIVOR(S) IN ALL CASES EXCEPT WHEN THE AIRCRAFT COMMANDER DETERMINES THAT THE CIRCUMSTANCES WILL UNNECESSARILY ENDANGER THE RESCUE SWIMMER.

B. BOAT - WHEN A MOTOR WHALEBOAT IS USED FOR RESCUE, THE BOAT CREW WILL HELP THE PERSON INTO THE BOAT. THE LIFE BOAT WILL HAVE A COMPLETE CREW ON BOARD WHICH INCLUDES A COXSWAIN, BOWHOOK, STERNHOOK, ENGINEER, CORPSMAN AND A RIFLE SHARPSHOOTER AND ALL MUST BE QUALIFIED SWIMMERS.

C. SHIPBOARD - THE SHIP WILL MANEUVER TO A POSITION WHERE A SWIMMER, TOWING A LINE, CAN REACH THE PERSON IN THE WATER.

105.7 EXPLAIN THE USE OF THE FOLLOWING ITEMS IN THE RECOVERY OF A MAN OVERBOARD: (REF. B,D)

A. LIFE RING/BUOY - A LIFE RING WITH AN ATTACHED DISTRESS MARKER IS AVAILABLE TOPSIDE NEAR THE QUARTERDECK, AT EACH MAN-OVERBOARD STATION, AND AT EACH REPLENISHMENT STATION. THROWN TO A MAN IN THE WATER. IT IS USED FOR FLOTATION AND AS A MARKER TO LOCATE THE MAN.

B. MARINE LOCATION MARKERS (SMOKE FLOAT) - THE MARINE LOCATION MARKER IS USED FOR LONG-BURNING, SMOKE AND FLAME REFERENCE-POINT MARKING ON THE OCEANS SURFACE. IN ADDITION TO BEING USED FOR ANTISUBMARINE WARFARE, IT IS ALSO USED FOR SEARCH AND RESCUE OPERATIONS. THIS MARKER PRODUCES A YELLOW FLAME AND WHITE SMOKE FOR 40 TO 60 MINUTES. THE MARKER IS VISIBLE FROM AN AIRCRAFT FOR AT LEAST 3 MILES UNDER NORMAL OPERATING CONDITIONS.

C. STROBE LIGHT - USED PRIMARILY AT NIGHT FOR LOCATING A MAN IN THE WATER. THE BATTERY-OPERATED STROBE LIGHT EMITS A HIGH-INTENSITY FLASHING LIGHT 40 TO 60 TIMES PER MINUTE.

D. SEARCHLIGHTS - INCANDESCENT SEARCHLIGHT IS USED PRIMARILY FOR SIGNALING AND SECONDARILY FOR ILLUMINATION. THE INCANDESCENT SEARCHLIGHT CONSISTS OF A MOUNTING BRACKET, LAMP-SUPPORTING YOKE, AND HIGH POWER (1000 WATT) INCANDESCENT LAMP HOUSED IN A DRUM. BY USING A BRACE OR EXTENSION BETWEEN THE MOUNTING BRACKET AND THE YOKE, THE LIGHT CAN BE SWUNG IN AN ARC TO CLEAR FIXED PORTIONS OF THE SHIP'S STRUCTURE DURING THE SEARCH FOR A SURVIVOR.

E. DYE MARKER - THE DYE MARKER PRODUCES A BRILLIANT YELLOWISH- GREEN FLUORESCENT WHEN IT IS SUBMERGED IN WATER. UNDER GOOD CONDITIONS, THE DYE WILL BE A GOOD TARGET FOR ONLY ABOUT 1 HOUR, BUT IT WILL RETAIN SOME OF ITS COLOR FOR UP TO 4 HOURS. FROM AN ALTITUDE OF 3,000 FEET, THE DYE MARKER MAY BE SEEN AS FAR AWAY AS 10 MILES. THE RANGE DECREASES AS THE DYE SPREADS OR IS DILUTED BY THE WATER.

105.8 STATE THREE EXAMPLES OF EMERGENCY FLOTATION DEVICES.
(REF. A)

IF A PERSON IS IN THE WATER WITHOUT A LIFE JACKET, HE CAN STAY AFLOAT BY USING SEVERAL ARTICLES INCLUDING THE FOLLOWING:

TROUSERS, BALLCAP, WHITEHAT, MATTRESS COVERS, SEA BAGS, LAUNDRY BAGS, PILLOW CASE, WOOD, EMPTY SHELL BOXES, POWDER CANS, GARBAGE BAGS, BUCKET, WRECKAGE

105.9 EXPLAIN THE FOLLOWING SHIPBOARD SURVIVAL EQUIPMENT:
(REF. A, B)

A. READY LIFEBOAT - THERE SHALL BE ONE MEMBER OF THE LIFE BOAT CREW QUALIFIED AS A RESCUE SWIMMER TO ASSIST THE SURVIVOR, ALL OTHER MEMBERS SHALL BE QUALIFIED AS SECOND CLASS SWIMMER. THE READY LIFEBOAT, USUALLY A MOTOR WHALEBOAT, SECURED FOR SEA IN DAVITS SHALL BE SWUNG OUT READY FOR LOWERING.

B. CO2 INFLATABLE LIFE RAFT - AMONG THE RAFT GEAR INCLUDED ARE A CANOPY, SEA ANCHOR, LIFELINE, BOARDING LINE, RAIN CATCHER TUBE, AIR HAND PUMPS, PADDLES, SPONGES, AND BOAT REPAIR KIT FOR PATCHING LEAKS, AND A FLOATABLE KNIFE. THE INFLATABLE LIFE RAFT ALSO CARRIES DESALTER KITS FOR TURNING SEAWATER INTO FRESHWATER. IN THE SURVIVAL KITS ARE FOOD RATIONS, SEA DYE MARKER, FLASHLIGHT, BATTERIES, SIGNAL MIRROR, WHISTLE, FIRST-AID KIT, DISTRESS SIGNAL KIT AND CONTAINERS OF FRESH WATER. THE SURVIVAL KITS IN LARGE RAFTS ARE DESIGNED TO SUSTAIN 15 TO 20 PEOPLE FOR 5 DAYS ON REGULAR RATIONS.

C. MK1 CO2 INFLATABLE LIFE JACKET - VEST-TYPE PRESERVER WHICH WEIGHS APPROXIMATELY 3 POUNDS AND PROVIDES A MINIMUM OF 29 POUNDS OF BUOYANCY. THE INFLATABLE LIFE PRESERVE IS BLOWN UP EITHER BY A CARBON DIOXIDE (CO2) CYLINDER OR BY MOUTH. IT IS EQUIPPED WITH A LIFTING HARNESS, A WAIST BELT, AND A WOOD TOGGLE AND LINE FOR ATTACHING ONESELF TO A LIFE RAFT OR ANOTHER SURVIVOR. EQUIPPED WITH A LIGHT, SEA DYE MARKER AND A WHISTLE.

D. INHERENTLY BUOYANT (KAPOK) LIFE JACKET - VEST TYPE LIFE PRESERVER IF ADJUSTED PROPERLY, IT WILL SUPPORT A PERSON AND KEEP THE HEAD OUT OF THE WATER EVEN IF THE PERSON IS UNCONSCIOUS.

105.10 DESCRIBE THE PURPOSE, DONNING PROCEDURES, TIME LIMITATIONS AND SAFETY PRECAUTIONS OF THE FOLLOWING: (REF. A)

A. EMERGENCY ESCAPE BREATHING DEVICE (EEBD) - THE EEBD IS DESIGNED TO PROVIDE RESPIRATORY AND EYE PROTECTION IN AN ATMOSPHERE THAT WILL NOT SUPPORT LIFE. THE EEBD WAS DEVELOPED TO GIVE A 15-MINUTE SUPPLY OF BREATHABLE AIR. IT IS WORN UNTIL A PERSON CAN GET TOPSIDE DURING EVACUATION FROM BELOW DECK SPACES. PRIMARY COMPONENTS OF THE EEBD ARE A PROTECTIVE HOOD AND LIFE-SUPPORT PACK. THE HOOD CONTAINS THE BREATHABLE AIR AND HAS A LARGE VISOR AND AN ELASTIC NECK SEAL TO PREVENT CONTAMINANTS FROM ENTERING THE HOOD. THE HOOD IS FIRE RESISTANT AND WILL PROTECT YOUR FACE FROM OPEN FLAME FOR ABOUT 6 SECONDS.

WARNING

DO NOT SMOKE OR GET NEAR AN OPEN FLAME AFTER IMMEDIATE USE OF THE EEBD DUE TO OXYGEN SATURATION OF THE HAIR. THE EEBD IS NOT TO BE USED AS FIRE-FIGHTING GEAR OR IN PLACE OF THE OBA. THE EEBD WAS DESIGNED TO BE USED AS AN ESCAPE DEVICE ONLY TO SAVE YOUR LIFE.

B. OXYGEN BREATHING APPARATUS (OBA) - WHEN PROPERLY FITTED AND WITH A CANISTER IN POSITION AND OPERATING, THE OBA WILL PREVENT SMOKE OR A TOXIC ATMOSPHERE FROM REACHING THE OPERATOR AND WILL PROVIDE THE WEARER WITH A SELF-GENERATING OXYGEN SUPPLY FOR A TOTAL PERIOD OF 60 MINUTES (MAXIMUM).

WARNING
DO NOT ALLOW CANISTERS TO COME IN CONTACT WITH OIL, GAS OR OTHER PETROLEUM BASED CHEMICALS AS THESE WILL CAUSE AN EXPLOSION!

C. SUPPLEMENTARY EMERGENCY EGRESS DEVICES (SEED) -

105.11 EXPLAIN THE FOLLOWING TYPES OF SHIPBOARD FITTINGS, INCLUDING WHEN THEY ARE OPENED AND CLOSED: (REF. A)

A. "X" (X-RAY) - MARKED WITH A BLACK "X". PROVIDES THE LEAST AMOUNT OF PROTECTION. IT IS SET WHEN THERE IS NO DANGER OF ATTACK. THESE FITTINGS ARE KEPT CLOSED AT ALL TIMES EXCEPT WHEN ACTUALLY IN USE. THESE CLOSURES ARE SECURED DURING CONDITIONS X-RAY, YOKE AND ZEBRA.

B. "Y" (YOKE) - MARKED WITH A BLACK "Y". SET AT SEA OR INPORT DURING WARTIME AND INPORT AFTER NORMAL WORKING HOURS DURING PEACETIME. THESE CLOSURES ARE SECURED DURING CONDITIONS YOKE AND ZEBRA.

C. "Z" (ZEBRA) - MARKED WITH A RED "Z". MAXIMUM PROTECTION IN BATTLE, IT IS SET IMMEDIATLY DURING THE SOUNDING OF GENERAL QUARTERS. IT IS ALSO SET WHILE LEAVING AND ENTERING PORT DURING THE TIMES OF WAR. THESE CLOSURES ARE SECURED DURING CONDITION ZEBRA.

D. "W" - (WILLIAM) - MARKED WITH A BLACK "W". THIS CLASSIFICATION IS APPLIED TO SEA SUCTION VALVES THAT SUPPLY WATER TO THE CONDENSERS AND FIRE PUMPS, AND TO OTHER FITTINGS AND EQUIPMENT NECESSARY FOR FIRE PROTECTION AND MOBILITY. IS ONLY SET WHEN WORK IS BEING PERFORMED ON OR AROUND SEA SUCTION VALVES.

E. CIRCLE "W" (CIRCLE WILLIAM) - MARKED WITH A BLACK "W" INSIDE A BLACK CIRCLE. VENTILATION FITTINGS AND CERTAIN ACCESS OPENINGS. SET TO PREVENT NBC CONTAMINATION OR SMOKE FROM ENTERING A VENT SYSTEM.

F. DOG "Z" (DOG ZEBRA) - MARKED WITH A RED "Z" INSIDE A BLACK "D". APPLIES TO ACCESSES TO WEATHER DECKS THAT ARE NOT EQUIPPED WITH LIGHT TRAPS OR DOOR SWITCHES THAT TURN LIGHTS OFF WHEN ACCESS IS OPENED, DURING DARKENED SHIP CONDITIONS.

G. CIRCLE "Z" (CIRCLE ZEBRA) - SAME AS RED CIRCLE "Z"

H. (BLACK CIRCLE "X" AND "Y"), ("BLACK CIRCLE X-RAY") OR ("BLACK CIRCLE YOKE") - MARKED WITH A BLACK CIRCLE AROUND A BLACK "X" OR "Y". FITTINGS PERMIT ACCESS TO BATTLE STATIONS, ARE USED FOR TRANSFER OF AMMUNITION, OR ARE PART OF VITAL SYSTEMS. THEY MAY BE OPENED WITHOUT SPECIAL PERMISSION, BUT MUST BE KEPT CLOSED WHEN NOT ACTUALLY IN USE.

I. RED CIRCLE "Z" (RED CIRCLE ZEBRA) - MARKED WITH A RED "Z" WITHIN A RED CIRCLE - SPECIAL FITTINGS MARKED RED CIRCLE ZEBRA MAY BE OPENED DURING LONG PERIODS OF GENERAL QUARTERS TO ALLOW FOR PREPARATION AND DISTRIBUTION OF FOOD OR FOR COOLING VITAL SPACES SUCH AS MAGAZINES. WHEN OPEN, THESE FITTINGS ARE GUARDED SO THAT THEY CAN BE CLOSED IMMEDIATELY IF NECESSARY.

J. MODIFIED ZEBRA - CONDITION ZEBRA THAT HAS BEEN MODIFIED TO FIT THE DAILY ROUTINE (IE HATCHES CLOSED AT THE WATER LINE BUT THE SCUTTLE HATCH OPEN, ETC)

105.12 EXPLAIN THE FOLLOWING CONDITIONS OF MATERIAL READINESS INCLUDING WHEN EACH IS NORMALLY SET: (REF. A)

A. X-RAY - CONDITION X-RAY PROVIDES THE LEAST PROTECTION. IT IS SET WHEN THE SHIP IS IN NO DANGER OF ATTACK, SUCH AS AT ANCHOR IN A WELL-PROTECTED HARBOR OR SECURED AT A HOME PORT DURING REGULAR WORKING HOURS, TO PROVIDE MAXIMUM FREEDOM OF MOVEMENT THROUGHOUT THE SHIP. ALL X-RAY FITTINGS ARE CLOSED WHEN CONDITION X-RAY IS SET.

B. YOKE - CONDITION YOKE IS SET AT SEA, IN PORT DURING WARTIME, AND IN PORT DURING PEACETIME AFTER WORKING HOURS. ALL X-RAY AND YOKE FITTINGS ARE CLOSED WHEN CONDITION YOKE IS SET. CHECKED TWICE DAILY AT SEA AND INPORT DURING WARTIME. CHECKED ONCE DAILY INPORT DURING PEACETIME.

C. ZEBRA - CONDITION ZEBRA PROVIDES MAXIMUM PROTECTION IN BATTLE. IT IS SET IMMEDIATELY, WITHOUT ORDERS, WHEN GENERAL QUARTERS IS SOUNDED AND WHEN ENTERING AND LEAVING PORT DURING WARTIME. IT MAY ALSO BE SET TO CONTROL FIRE AND FLOODING WHEN NOT AT GENERAL QUARTERS. ALL X-RAY, YOKE AND ZEBRA FITTINGS ARE CLOSED WHEN CONDITION ZEBRA IS SET.

105.13 DESCRIBE THE SHIPBOARD SPACE, FRAME AND DECK NUMBERING SYSTEM. (REF. A) EVERY SPACE IN A SHIP (EXCEPT MINOR SPACES, SUCH AS PEA COAT LOCKERS, LINEN LOCKERS, AND CLEANING GEAR LOCKERS) IS ASSIGNED AN IDENTIFYING LETTER AND NUMBER SYMBOL. THIS SYMBOL IS MARKED ON A LABEL PLATE SECURED TO A DOOR, HATCH, OR BULKHEAD OF THE COMPARTMENT. COMPARTMENTS ON THE PORT SIDE END IN AN EVEN NUMBER, AND THOSE LOCATED ON THE STARBOARD SIDE END IN AN ODD NUMBER. A ZERO PRECEDES THE DECK NUMBER FOR ALL LEVELS ABOVE THE MAIN DECK.