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Navigation Rules

US Coastguard

Marine weather report ( US )

Marine weather report (Canada)

Marine weather world

International code of signals

Sample International Code of Signals Messages
Flag Hoist	Code	Meaning
	AC	I am abandoning my vessel.
	AD	I am abandoning my vessel which has suffered a nuclear accident and is a possible source of radiation danger.
	AN	I need a doctor.
	AN 1	I need a doctor; I have severe burns.
	AN 2	I need a doctor; I have radiation casualties.
	EL	Repeat the distress position.
	EL 1	What is the position of vessel in distress?
	GM	I cannot save my vessel.
	GN	You should take off persons.
	GN 1	I wish some persons taken off. Skeleton crew will remain on board.
	GN 2	I will take off persons.
	GN 3	Can you take off persons?
	IT	I am on fire.
	MAA	I request urgent medical advice.
	MAB	I request you to make rendezvous in position indicated.
	MAC	I request you to arrange hospital admission.
	MAD	I am . . . (indicate number) hours from the nearest port.
	MS 1	My vessel is a dangerous source of radiation; you may approach from my starboard side.
	VG	The coverage of low clouds is… (number of octants or eighths of sky covered).
	US 4	Nothing can be done until weather moderates.

Seaflags  Signalling External links  Wikipedia.0rg