SHIP OR AUTHORITY COMMODORE VICE  COMMODORE REAR  COMMODORE CONVOY (COLLECTIVELY) TEAM THIS, OR SECTION . . . OTC ESCORT  SHIPS  (COLLECTIVE) ESCORT SHIPS (INDIVIDUAL) RESCUE SHIPS GUIDED MISSILE SHIP ESCORTING  AIRCRAFT STRAGGLERS VOICE RADIO/ FLASHING LIGHT BULL CALF COLT SACK BOSS GANG SODA CORK* SHOT PLANK LAZY *followed by 1,2,3, etc. as necessary Figure 7-3.—Convoy special call signs. execution, the text may be repeated prior to sending “STANDBY-EXECUTE.” FLAG SIGNALING Flag  signaling  procedures  are  based  on  those found in Pub 102, with the following additional rules: A flaghoist without a call is addressed to the commodore when made by a ship in the convoy, or it is addressed to the convoy when made by the commodore. The moment of execution is the moment when the hoist is hauled down. When hoisted by a warship, signals from ATP 2,  volume  II,  will  be  preceded  by  the  4^TH substitute. Signals from Pub 102 will be preceded by the code  pennant. All flag signals are to be repeated flag for flag. Remember flags, merchant ships do not carry 4TH substitute. FLASHING LIGHT Flashing  light  should  be  restricted  to  minimum use. Both directional and non-directional light may be used. These procedures are based on those found in the International   Code   of   Signals,   except   for   the following  procedure  signs: FFFF—Used preceding a call to order the called station not to answer this transmission. IX—Action on the message or signal which follows is to be carried out upon receipt of the prosign IX 5 SECOND FLASH. IX 5 SECOND FLASH—Carry out the purpose of this message or signal to which this applies. Executive   method   is   normally   used   for transmitting a maneuvering signal or other signals requiring  simultaneous  actions. PYROTECHNICS Pyrotechnics are designed for use at night in case of extreme urgency, threat of enemy attack, or when thick weather justifies their use for maneuvering. The  use  of  pyrotechnics  for  maneuvering  in convoy is left entirely to the commodore's discretion, and if used, they are for emphasizing the urgent nature of the maneuver. With the possible danger of cargo explosion from fumes, masters with dangerous cargos should exercise their discretion in regard to the firing of rockets and pyrotechnics. Independently  routed  merchant  ships  are  to  fire NO LESS THAN TWO WHITE ROCKETS if they are damaged by enemy action between dusk and dawn. This should, in good visibility, serve to attract the attention of naval vessels and aircraft, as well as warn other   merchant   ships   in   the   area.   Masters   of independently routed ships should turn directly away upon sighting this signal. A  ship  in  convoy  that  sighted  a  previously undetected enemy submarine or surface craft or which is torpedoed must immediately tire at least TWO WHITE  ROCKETS  IN  QUICK  SUCCESSION. If a ship in convoy accidentally fires a rocket or other   pyrotechnic   device,   that   ship   should immediately make the colored signal for negative (white over red over green). In addition, the letters NO may be sounded on the ship's siren (ship's whistle). This should prevent the escort from taking the usual countermeasure  against  enemy  attack. Rocket   and   pyrotechnic   signals   and   their meanings  are  contained  in  ATP  2,  volume  II,  table II-V. 7-8