Page 13 - Electronic Navigation Cyber Book

• Assuming heading data has been input, the yoke will be offset based
on this data. It will be slewed from the meridian, either clockwise or
anticlockwise.

• The gyro wheel is brought up to speed within 14 min.

• The yoke is slewed back and forth to level the ballistic. This action takes
about 4 min.

• Again assuming heading data has been input, the gyrocompass will
settle within 1 h and the settle indicator lamp goes out. If no heading data
was entered, the compass will automatically settle within 5 h.

Other inputs to the gyrocompass are as follows.

• Heading: in the range 0 to 359°. If the entered heading is in error by
more than 20° from the true heading, the compass takes 5 h to settle.

• Initialize and Synchronize Step Repeaters. An operator selects a
repeater and when requested uses the keypad's left or right arrow
switches to scroll the display to the repeater's current position. After 10 s
the system steps the repeater to the compass heading. It is essential to
repeat and double check this procedure because there must be no
alignment errors in a repeater system.

• Speed Input. Using the left or right arrow keys, an operator inputs a
speed in the range 0-70 knots.

• Latitude Input. Using the arrow keys, an operator inputs latitude in
degrees north or south of the equator.

© 2018 Digital Galaxy Index 13