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 (d. above). This system is fuse protected, and consists
(2) The running lights are provided with double
of the following:
filament lamps, and a fused circuit to each filament. An
(1) A general alarm switch located in the
alarm system employing a common warning buzzer
pilothouse.
(and individual indicator lamps) function to indicate
(2) A ten-inch bell and lamp with a red lens
filament or fuse failure. When buzzer sounds, test the
located in engine room at port side.
fuse (Replace a defective fuse). If fuse is serviceable,
(3) An eight-inch bell located in crew quarters.
and buzzer still sounds, move applicable switch (fig. 2-
(4) An eight-inch bell located in main deck
passageway at center of ship.
lamp at earliest opportunity.
(5) An eight-inch bell located on bulkhead in the
(3) The towing lights (upper and lower) and
galley.
anchor light are supplied and controlled from the
(6) Operate the general alarm by moving switch
navigational light control panel. These lamps are single
in pilot house to ON.
filament.
(7) Secure the general alarm by moving switch
(4) The blinker light circuit consists of two lights
to OFF.
mounted on the yardarms, and two blinker key stations.
g. Main Electrical Control Panel Operation. This
One station is located on top of, the other inside the
pilothouse. This circuit is supplied by, and controlled
panel is located in the engine room and is the primary
from, the navigational light control panel.
control station for the tug electrical system. It is of the
f. General Alarm System Operation. The general
dead-front type, with all connections made on back of
the panel (fig. 2-22) and the purposes that follow:
alarm system is powered by batteries, kept at full charge
through the battery charging control panel
2-43
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