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Navigational Lights, Continued
Name
2. Blinker
3. Aircraft
Warning
Description
Energized When
The blinker lights are located on the
Used as an alternative method
yardarms and are used for sending
of sending flashing light at
flashing light. The blinker lights are
night.
used with signal keys, which are
normally installed on the bridge and
signal bridge. The blinker light switch
must be in the ON position for the
signal key to be activated.
The aircraft warning lights are 360° red
From sunset to sunrise when
lights. They are installed at the truck of
your ship is at anchor or
each mast that extends more than 8
moored.
meters (26 feet) above the highest point
of the superstructure. Two aircraft
When operating aircraft at
warning lights are installed if the one
night.
light cannot be seen throughout 360°. If
two masts are tall enough to require
these lights but are less than 15 meters
apart, they will be installed only on the
higher mast.
4. Not Under
The crank/switch controls a pair of red
Not Under Command--When
Command/
lights that have multiple uses. The
the switch is in the ON
Man
lights are located 6 feet apart
position, it turns on the red
Overboard
(vertically) and mounted on brackets
lights, which indicate that your
that extend abaft the mast or structure
ship has had a breakdown.
and to port thereof. This mounting
arrangement permits visibility, as far as
Man Overboard--When the
practicable, throughout the 360° arc.
switch is continually turned ON
and OFF by use of the crank, it
causes the pair of red lights to
blink ON and OFF (pulsate),
indicating that your ship has a
man overboard.
11-17
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