SignalInternationalGreat Lakes
1 quick blast (Morse E) i am transforming course come Starboard (Flag E)
ns intend to leaving you ~ above my harbor side
2 brief blasts (Morse I) ns am changing course to harbor (Flag I)
ns intend to leaving you on my Starboard
3 brief blasts (Morse S) i am operation in turning back (Flag S)
5 brief blasts Danger ..or.. Message Not Understood
1 prolonged blast Entering a blind turn or leaving a dock
1 long blast every 2 minutes Power-driven vessel operating in bad visibility
1 long blast + 2 brief blasts every 2 minute Sailing vessel operating in negative visibility
Short blast is a blast of 1 second duration. A prolonged (long) blast is 4 come 6 seconds. (One an extremely long blast offered to average abandon delivery -- probably still does.)

1 lengthy blast + 3 short blasts is make by the last vessel in a tow (usually in reply to a signal make by towing vessel). I did not incorporate this above because I might not check it"s an international signal.

When a courage in a small channel or tidal present is meeting an additional vessel, the vessel the is heading with the current makes 1 short blast if altering to starboard (the norm) and also 2 brief blasts if changing to port. The courage that must "give way" come the an initial vessel replies with THE very same SIGNAL if in covenant or through the peril signal (5 brief blasts) if in doubt. Pleasure watercrafts do not usually use these signals once passing typically (port come port) however if a large ship signals you, be certain to answer back -- and get the end of his street! You must always give method to big ships!

And climate there"s train signals, which have actually nothing in typical with boats:3 brief toots + one long toot means a level crossing through lights however no barriers.

Canal Locks:

When approaching a lockstation, you have to use a slightly various sound signal. 3 lengthy blasts method you wish to lock through. 4 long blasts method you need both gates opened (don"t carry out this if you space in a small cruiser uneven it"s your very first lock or you"re having actually trouble).


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Girlfriend don"t need to signal if the doors are open and you room making a course to enter. If you space not walk to get in the lock, indicate your intensions by changing course.(In Canadian legacy canals, the leaf of the technique dock is commonly painted "blue" and also reserved for watercrafts waiting for the next lockage.)