Gyropilot

TM 55-1915-200-10

weather deck above the pilothouse. Twelve sprinkler

1-10.19.

Navigation Lighting System.

The

heads direct the water to wash down the superstructure.

navigation lighting system provides the appropriate

The system is activated by a key operated switch in the

exterior lights for safe navigation. The system is

pilothouse.

controlled from the navigation light panel in the

pilothouse. The navigation light panel receives 120 Vac

1-10.16.

Gyropilot. The gyropilot is an automatic

from the emergency distribution panel, EP2.

steering control system which uses heading information

1-10.20.

Sound Powered Telephone System The

from the ship gyrocompass to control the ships steering

gear. The gyropilot energizes solenoids, part of the

sound-powered telephone system provides voice

vessel's steering control group, to maintain selected

communications throughout the ship.

The sound-

heading. The gyropilot heading selector combines the

powered telephone system contains fixed phone stations

functions of a heading selector with a gyrocompass

and portable units. Since the system is powered by

repeater. The heading selector contains controls that

voice only, it is functional even with the loss of all ships

permit the selection of operating mode and desired

power.

heading. The gyropilot control amplifier processes the

signals from the gyropilot heading selector and the

1-10.21.

Electrical System. The electrical system

rudder repeatback unit to develop steering signals which

distributes primary, secondary, and emergency power

are sent to the steering group solenoids. This provides

throughout the ship. The primary power is received

rudder control. The gyropilot rudder repeatback unit

from the power generation system ships service

sends signals from the steering group, providing rudder

generators and routed via the main ship service

position information, back to the control amplifier.

switchboard to ship service power and lighting panel.

Primary power is provided to a transformer, stepped

1-10.17.

Magnetic Compass.

The magnetic

down to 120 Vac for lighting and receptacles and routed

to lighting panels in the engine room; main deck, port

compass provides heading information using a reflector

and starboard; officers deck, and pilothouse. Primary

compass mounted in a periscope binnacle.

The

power at 440 Vac and secondary power at 120 Vac is

binnacle is mounted on the pilothouse top with the

provided to machinery and work spaces via several

periscope extending into the pilothouse located

distribution panels. Essential engineering equipment

underneath.

A reflection of the compass card is

and systems tied into the emergency switchboard

projected through the center of the binnacle. The

normally receive power from the main switchboard via

compass can be read from either the pilothouse or

automatic bus transfer equipment. When primary power

pilothouse top. A toggle switch and rheostat control

is lost, the essential engineering equipment receives

provide power to two lamps located in the binnacle.

power from the emergency generator. When tied to

shore power the ship distribution is the same as

1-10.18.

Refrigeration Units. Refrigeration units

provided for primary power.

maintain the temperature in the chill room and the

freeze room.

Each room has an independent

1-10.22.

Piping Systems. Functional descriptions

refrigeration unit. One unit keeps the chill room at 340F

and the other keeps the freeze room at 100F. The

of the various vessel piping systems are provided in the

refrigeration units are thermostatically controlled to turn

following paragraphs.

on when the temperature in the room rises 20 to 40F.

1-104