Explains that friction at gimbal pivots produces torques which give rise to precession States that the rate of precession is proportional to the applied torque States that 'tilt' as movement of the spin axis in the vertical plane States that 'drift' as the apparent movement of the gyroscope in azimuth resulting from the earth's rotation Describes non-mathematically the apparent movement of a free gyroscope on the earth's surface, given its position and initial attitude Uses the apparent motion of a celestial body in the direction of the gyro axis to aid the description Explains how a free gyroscope can be made north-seeking by the use of gravity control and describes the resulting oscillations of the axis Describes the use of damping in azimuth and damping in tilt to cause settling of the axis and thus produce a gyro-compass Explains that control and damping can be achieved by replacing the ballistic elements with electrical signals, provided by tilt sensors, to produce torques about the vertical and horizontal axes Compass magnetic and gyro Describes a familiar gyro-compass with particular reference to: – Plan and conduct a passage (Cont) the method of support and determine position (Cont) control and damping arrangements Knowledge of the principles of the method of maintaining the heading indication in line with the axis magnetic and gyro-compasses of the gyro the transmission of heading to repeaters 6 Hours Demonstrates the starting of the gyro-compass and explains how to minimize settling time by slewing and leveling it to the correct heading Explains the necessary time for the compass to settle after switching on prior to sailing Lists the settings to be made or adjusted while the compass is in use
Plan and conduct a passage and determine position (Cont) Compass – magnetic and gyro (Cont) Knowledge of the principles of magnetic and gyro-compasses Explains that friction at gimbal pivots produces torques which give rise to precession States that the rate of precession is proportional to the applied torque States that 'tilt' as movement of the spin axis in the vertical plane States that 'drift' as the apparent movement of the gyroscope in azimuth resulting from the earth's rotation Describes non-mathematically the apparent movement of a free gyroscope on the earth's surface, given its position and initial attitude Uses the apparent motion of a celestial body in the direction of the gyro axis to aid the description Explains how a free gyroscope can be made north-seeking by the use of gravity control and describes the resulting oscillations of the axis Describes the use of damping in azimuth and damping in tilt to cause settling of the axis and thus produce a gyro-compass Explains that control and damping can be achieved by replacing the ballistic elements with electrical signals, provided by tilt sensors, to produce torques about the vertical and horizontal axes Describes a familiar gyro-compass with particular reference to: the method of support control and damping arrangements the method of maintaining the heading indication in line with the axis of the gyro the transmission of heading to repeaters Demonstrates the starting of the gyro-compass and explains how to minimize settling time by slewing and leveling it to the correct heading Explains the necessary time for the compass to settle after switching on prior to sailing Lists the settings to be made or adjusted while the compass is in use 6 Hours
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