15 Remote Indicating Compass

Question 1

What is a Remote Indicating Compass also know as?

Answer 1

• Gyro-Magnetic Compass
• Slaved Gyro
• Magnetic Heading Reference System (MHRS)

Question 2

What kind of accuracy does a Remote Indicating Compass provide?

Answer 2

Combines the Short Term accuracy of a Gyro with the Long Term accuracy of a Compass

Question 3

What is the Principle of Operation of a Remote Indicating Compass?

Answer 3

• The Gyro system is the same as in a DG (i.e. horizontally tide)
• Two detector units (usually positioned on the wings or on the horizontal tail plane) read the local lines of magnetic flux
• Any deviation read by the detectors is converted to an electrical signal
• The signal is sent through to an error detector, on to an amplifier in order to run a ‘Precession Motor’
• The motor adjusts the position of the gyro and thus correct any drift
• It is ‘Self-Sorting’

Question 4

What are the Magnetic Detector units on a Remote Indicating Compass also known as?

Answer 4

• Flux Valve
• Detector Element
• Magnetometer

Question 5

What is the purpose of the liquid with in a Flux Valve for a Remote Indicating Compass?

Answer 5

Assist in dampening during manoeuvres

Question 6

What is the name of the mounting used with in a Flux Valve for a Remote Indicating Compass and what directions of freedom does it allow?

Answer 6

• Hooke’s Joint

- Allows freedom in Pitch and Roll

Question 7

Regarding the ‘spokes’ within a Flux Valve for a Remote Indicating Compass:

• What are they called
• How many are there
• What is the spacing between them

Answer 7

• Horns
• Three
• 120 degrees

Question 8

What is the accuracy of a Flux Valve for a Remote Indicating Compass?

Answer 8

+- 0.5 degrees