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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
PT PT 3 AIDS TO NAVIGATION-NAVIGATION TIDE The tide is slack.
PU PU AIDS TO NAVIGATION-NAVIGATION TIDE The tide begins to rise at time indicated.
PU PU 1 AIDS TO NAVIGATION-NAVIGATION TIDE When does the tide begin to rise?
PV PV AIDS TO NAVIGATION-NAVIGATION TIDE The tide begins to fall at time indicated.
CB CB DISTRESS-EMERGENCY ASSISTANCE I require immediate assistance.
PV PV 1 AIDS TO NAVIGATION-NAVIGATION TIDE When does the tide begin to fall?
PW PW AIDS TO NAVIGATION-NAVIGATION TIDE What is the rise and fall of the tide?
PW PW 1 AIDS TO NAVIGATION-NAVIGATION TIDE What is the set and drift of the tide?
PW PW 2 AIDS TO NAVIGATION-NAVIGATION TIDE What is the depth at high and low water here (or in place indicated)?
PX PX AIDS TO NAVIGATION-NAVIGATION TIDE The rise and fall of the tide is... (number feet or meters).
PY PY AIDS TO NAVIGATION-NAVIGATION TIDE The set of the tide is... degrees.
PZ PZ AIDS TO NAVIGATION-NAVIGATION TIDE The drift of the tide is... knots.
QA QA AIDS TO NAVIGATION-NAVIGATION TIDE The depth at high water here (or in place indicated) is... (number feet or meters).
QB QB AIDS TO NAVIGATION-NAVIGATION TIDE The depth at low water here (or in place indicated) is... (number feet or meters).
QB QB AIDS TO NAVIGATION-NAVIGATION TIDE The tide was high water when the vessel went aground
CB CB 1 DISTRESS-EMERGENCY ASSISTANCE I require immediate assistance; I have a dangerous list.
QB QB AIDS TO NAVIGATION-NAVIGATION TIDE The tide was half water when the vessel went aground
QB QB AIDS TO NAVIGATION-NAVIGATION TIDE The tide was low water when the vessel went aground
QB QB AIDS TO NAVIGATION-NAVIGATION TIDE At what state of tide did you go aground?
QC QC AIDS TO NAVIGATION-NAVIGATION TIDE You should wait until high water.

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