Gyrocompass

TM 55-1915-200-10

1-10.3. Gyrocompass. The gyrocompass provides

Primary control is from the pilothouse console (PHC)

heading information to the pilothouse for steering the

with one person at the engine room console (ERC). The

ship. The heading is also sent to repeaters at several

system permits one person to observe all important

ship locations and is the source for the ship gyropilot.

operating conditions and initiate many functions from

The master compass is provided with a viewing window

the ERC. A diagram of the CCMS is provided in FO-1.

and a dial, for viewing ship's heading. An electronic

control provides for control and monitoring of the

1-10.6.1. Engine Room Console (ERC). The ERC

gyrocompass and the routing of heading to ship's

provides a centralized engine room location for:

repeaters. The outputs of the gyrocompass, with the

controlling propulsion and bow thruster direction and

repeater switch on, are applied to the MK 37 MOD E

speed; monitoring propulsion machinery operating

power transmitter, via the switching unit. The power

conditions; monitoring machinery alarm conditions;

transmitter distributes the gyrocompass outputs to the

communicating propeller shaft speed and direction;

repeaters. The switching unit drives the step repeaters.

alerting non-duty engineering personnel of engine room

alarm conditions and calling personnel for watch; and

1-10.4. MK 37 MOD E Power Transmitter. The power

monitoring ERC operator alertness. These functions are

provided to the ERC via interfaces to: the dual throttle

transmitter receives data from the MK 27 Mod 1

control system, the monitoring system, the engineer's

Gyrocompass system, amplifies the data, and transmits

alarm system, the EOT system, the watch

it to gyrocompass repeaters. The repeater assembly

call/assistance needed system, and the attendance

receives and amplifies the signal from the gyrocompass;

monitor system.

and the transmission assembly distributes the amplified

compass data to the repeaters.

1-10.6.2.

Pilothouse Console (PHC).

The PHC

1-10.5. Compass Repeater. The compass repeaters

provides control and monitoring of the main propulsion

provide remote indications of the ship's heading as

power train during usual ship operating and

determined by the gyrocompass. The repeater receives

maneuvering conditions without intervention of engine

heading signals from the gyrocompass via the MK 37

room personnel. The PHC also provides a centralized

MOD E power transmitter. A dc step motor responds to

pilothouse location for: controlling bow thruster direction

signals sent from the gyrocompass switching unit via the

and speed; monitoring machinery alarm conditions;

power transmitter. The dc step motor is geared to a

communicating propeller shaft speed and direction; and

compass card which provides a readout of ship's

main engine shutdown if a vital malfunction occurs.

heading. The compass repeaters are turned on by the

These functions are provided to the PHC via interfaces

repeater switch on the compass control panel.

with the dual throttle control system, the monitoring

system, the engineer's alarm system, the EOT system,

1-10.6. Centralized Control and Monitoring System

and the main engine automatic shutdown system.

(CCMS). The CCMS provides for the centralization of

1-10.6.3. Throttle Control System. The throttle control

the control and monitoring functions for the main

propulsion power train, selected pumps, and vital

system provides pneumatic throttle and direction control

alarms. Pilothouse and engine room throttle control is

for propulsion and bow thruster engine at the ERC and

possible without intervention of engine room personnel.

PHC. The system

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