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Flag Combinations

The purpose of the International Code of Signals is to provide ways and means of communication in situations related essen- tially to safety of navigation and persons, especially when language difficulties arise. In the preparation of the Code, account was taken of the fact that wide application of radiotelephony and radiotelegraphy can provide simple and effective means of communication in plain language whenever language difficulties do not exist.

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Flag Code Code Section Sub-Section Meaning
KR KR CASUALTIES-DAMAGES TOWING-TUGS All is ready for towing.
LN LN 1 AIDS TO NAVIGATION-NAVIGATION AIDS TO NAVIGATION All lights are out along this coast (or the coast of...).
TC TC MISCELLANEOUS CREW-PERSONS ON BOARD All persons lost
GZ GZ 1 DISTRESS-EMERGENCY SEARCH AND RESCUE All persons lost.
TC TC MISCELLANEOUS CREW-PERSONS ON BOARD All persons saved
GZ GZ DISTRESS-EMERGENCY SEARCH AND RESCUE All persons saved.
RZ RZ MANEUVERS PROCEED-UNDERWAY All vessels should proceed to sea as soon as possible owing to danger in port
NE NE AIDS TO NAVIGATION-NAVIGATION DANGERS TO NAVIGATION-WARNINGS All vessels should proceed to sea as soon as possible owing to danger in port
UL UL MISCELLANEOUS PORT-HARBOR All vessels should proceed to sea as soon as possible owing to danger in port.
OS OS 3 AIDS TO NAVIGATION-NAVIGATION MINES-MINESWEEPING Am I out of the dangerous zone?
BK BK 1 DISTRESS-EMERGENCY AIRCRAFT-HELICOPTER Am I overhead?
JF JF 3 CASUALTIES-DAMAGES GROUNDING-BEACHING-REFLOATING Amidship.
AK AK DISTRESS-EMERGENCY ACCIDENT-DOCTOR-INJURED/SICK An aircraft is circling over the area of accident
BJ BJ 1 DISTRESS-EMERGENCY AIRCRAFT-HELICOPTER An aircraft is circling over the area of accident.
DQ DQ DISTRESS-EMERGENCY BOATS-RAFTS An empty boat/raft has been sighted in lat... long... (or bearing... from place indicated, distance...).
EK EK 1 DISTRESS-EMERGENCY DISTRESS An explosion was seen or heard (position or direction and time to be indicated).
QU QU MANEUVERS TO ANCHOR-ANCHOR(S)-ANCHORAGE Anchoring is prohibited.
NA NA 6 AIDS TO NAVIGATION-NAVIGATION DANGERS TO NAVIGATION-WARNINGS Anchors with buoys extend up to one mile from this vessel/rig. You should keep clear.
OY OY 3 AIDS TO NAVIGATION-NAVIGATION MINES-MINESWEEPING Are there mines in the port entrance or fairway?
EM EM DISTRESS-EMERGENCY DISTRESS Are there other vessels/aircraft in the vicinity of vessel/aircraft in distress?

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