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Maneuvering and Warning Signals
Rules
Regulating
Sound and Light
Signaling
Equipment
Required on
Vessels
A vessel of 12 meters or more in length must be provided with a whistle
and a bell. Vessels that are 100 meters or more in length must also
have a gong. The tone of the gong cannot be confused with the tone of
the bell. The bell and the gong must comply with the specifications
listed in Annex III. As with the whistle, these specifications were taken
into account when the ship was outfitted. A light may be used at night
for signaling. The light must be, if fitted, an all-round white light,
visible at a minimum range of 5 miles, and must comply with the
provisions of Annex I to the International Rules.
A vessel of less than 12 meters in length will not be required to carry
the signaling equipment described above, but must carry some efficient
means of sound signaling.
Supplemental
Light Signals
When vessels are in sight of one another, that is, a power-driven vessel
under way, maneuvering as authorized or required by these Rules, they
must indicate that they are maneuvering by the following signals on the
whistle. Any vessel may supplement the whistle signals prescribed by
light signals, repeated as appropriate while the maneuver is being carried
out.
Situation
Supplemental Light
Inland:
I intend to leve you on my port
one flash
side.
Int’l: Altering course to starboard.
Inland:
I intend to leave you on my
starboard side.
two flashes
Int’l: Altering course to port.
Inland and Int’l: Operating astern
three flashes
propulsion.
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