Aircraft Warning Lights
participate in ASW operations. The light is positioned
on either the yardarm or mast platform where it can best
The AIRCRAFT WARNING LIGHTS (red) are
be seen all around the horizon. Two red, two green, and
32-point (360°) lights (fig. 4-23, view A) installed at or
two amber lenses are provided with each fixture. The
near the top of each mast. If the light cannot be located
colors used are determined by operating forces.
so that it is visible from any location throughout 360° of
azimuth, two aircraft warning lights (one on each side
Station Marker Box Signal Light
of the mast) are installed However, a separate aircraft
warning light is not required if a 32-point red light is
The STATION MARKER BOX SIGNAL LIGHT
installed at the truck of a nearby mast for another
(fig. 4-24) has nine holes, each fitted with a red lens.
purpose. The fixtures are spraytight and equipped with
The hand-operated individual shutters hinge upward.
multiple sockets provided with 15-watt, one-filament
lamps (fig. 4-23, view B).
One watertight receptacle is installed at each
Revolving Beam ASW (Grimes) Light
replenishment-at-sea station, outboard near or under the
rail or lifeline. On some underway-replenishment ships,
The REVOLVING BEAM ASW (GRIMES)
LIGHT is displayed for intership signaling during ASW
the boxes are permanently mounted The lights have no
special arcs-of visibility requirements.
operations and is installed on all ships equipped to
Figure 4-23.--Constrained by draft and/or task light fixtures.