Figure 4-22.--Dimmer control panel, symbol 989.
NOTE: Navigation lights do not conform to the
is installed near the stem on ships that are engaged in
rules of the road when they are in the dim position;
convoy operations and mounted to show an unbroken
therefore, they are dimmed ONLY when directed by
arc of light from dead astern to 6 points on each side of
SIGNAL LIGHTS (OPERATIONAL
The WAKE LIGHT (white) is installed on the
Task lights are used to indicate the ship is in a
restricted maneuverability status (replenishment at-sea
flagstaff or after part of the ship to illuminate the wake
or aircraft operations). Hull contour lights are required
and is mounted so that no part of the ship is illuminated.
to indicate the contour of the ship. Station marker lights
The fixture is spraytight and of tubular construction.
are used on ships, capable of delivery, to mark the
One end of the fixture is fitted with an internal screen,
replenishment station location.
having a 1 1/4-inch diameter hole provided with a lens
(1 13/16-inch diameter x 3/16-inch thick) through
which light is emitted from a 50-watt lamp (T-12
tubular). A suitable mounting bracket is included for
The STERN LIGHT (blue) is a 12point (135°) light,
adjusting the position of the light, thereby illuminating
similar to the previously described white stem light. It
is a watertight fixture provided with a 50-watt lamp and
the ship's wake.