HELPFUL INFORMATION
Sound Signals
Out on the water, whistle or horn signals are commonly
used. Although using a signal is not necessary every time
a boat is nearby, operators must signal their intentions
when necessary to avoid potentially confusing or
hazardous situations. Use whistle blasts early enough to
be noticed and understood by other boaters.
It is customary for the privileged boat to signal first and the
give way boat to return the same signal to acknowledge
she understands and will comply. Use the danger signal
(five or more short and rapid blasts) if intent is not clear. A
short blast is 1 or 2 seconds long. A long blast is 4 to 6
seconds long. The Navigational Aids Chart at the end of
this chapter lists the meanings of the various whistle
signals.
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