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Sound Signal MnemonicsThe sound signals used in the collision regulations are vital yet can be complicated if you do not know Morse Code. Fortunately it is quite easier to create mnemonics for them. Note: the interpretation of the collision regulations below is sometimes simplified for the purpose of remembering. Always check a copy of the regulations for the full definition. |
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Sound Signals for Manoeuvring
Sound Signals Mnemonics in Restricted VisibilityRestricted visibility signals start with a long blast. Imagine it long so as to give you time to focus on where it is coming from.
At AnchorAt anchor, a vessel sounds a bell. Like a buoy, the vessel will stay in one place. A buoy's sound signal is often a bell as well. A vessel at anchor sounds a bell for five seconds every minute. You could think of the bows of the vessel as a V (seen from above) which is the Roman letter for 5. A traditional anchor (left) also has a clear V shape.
AgroundA (large) vessel aground shows three balls in line during the day. As a sound signal, it sounds three strokes of the bell before and after the normal five seconds ringing for anchoring (see above). |
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