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 TM 55-1905-219-14-1
HEADING SELECTOR.
a. The Heading Selector is used as an interface between a gyrocompass and steering control equipment to
select the desired heading of the vessel. The gyrocompass transmits actual heading data to the Heading Selector for
comparing the actual heading data with the ordered heading data. If the actual heading and the ordered heading are the
same, there is no signal output from the Heading Selector. If the actual heading and the ordered heading differ, the
Heading Selector will produce a signal that will cause the rudder positioning equipment to change the vessel's actual
heading to its ordered heading. Three-wire synchro data from the gyrocompass provides the heading information.
b. The Heading Selector consists of a circuit card 1882518 and associated controls and wiring mounted in an
enclosure. The unit is fitted with an adjustable mounting bracket that allows positioning for operating convenience.
MOTOR CONTROLLER.
The Motor Controller is an AC, across-the-line non-reversing unit that controls the three-phase electric motor used
with the Hydraulic Pump oh marine steering systems. The drip-proof case of the controller contains a LOCAL-OFF-
REMOTE switch and a RESET control on the front panel and houses line contactor, power transformer, control relay and
fuses. The controller also contains terminals to which remote accessory indicator lamps can be connected to show when
the motor is under overload conditions. The overload lamp will remain lighted after a brief overload has passed until the
remote RESET control is pushed. If the lamp remains lighted after the RESET control is pushed, the overload condition
still exists.
FLANKING RUDDER LIMIT SWITCH ASSEMBLY.
The Flanking Rudder Limit Switch moves the Flanking Rudders to hard left or hard right.
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