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Page Title:
Table 2-1. Description of Operator's Controls and Indicators - CONT |
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 TM 55-1915-200-10
Table 2-1. Description of Operator's Controls and Indicators - CONT
Key
Control or Indicator
Function
Gyrocompass Mark 27 Mod 1 Electronic Control Panel (FIGURE 2-2)
1
Caged Button
Depressed cages gyrocompass.
2
Viewing Window
Allows gyrocompass heading check.
3
Level Meter
Indicates title of gyroscope spin axis;
two minutes per division.
4
FOLLOW-UP ALARM Lamp
Should this light illuminate, the
gyrocompass would lose one axis of
freedom and could no longer be con-
sidered a gyroscope.
5
POWER Lamp
Lights red to indicate power available
to compass circuits.
6
DIMMER Control
Controls illumination level of compass
card on master compass.
7
MODE SELECTOR
SLEW Position energizes all circuits
except gyroscope motor and repeaters;in
START position gyroscope is brought up
to speed; in RUN position, TILT/AZIMUTH
switch is not energized; in MANUAL LEVEL
position, TILT/AZIMUTH switch is
energized; in AUTO LEVEL position,
gyroscope is brought to approximate
level position. OFF position turns
system off.
8
8 AMP DC Fuse
Protects internal power supply.
9
TILT/AZIMUTH
Controls gyrocompass direction of
rotation and supplies tilt signal.
10
1 AMP AC Fuse
Protects 120 volt circuit.
11
1 AMP RPTR Fuse
Protects repeater internal power supply.
12
RPTR Switch
Applies power to repeaters.
13
LATITUDE Control
Compensates for ship's latitude system.
2-11
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