DGM-4MHC’s

• M-, A-, and L-coils

• Up to 90 power amps for degaussing coils

• Control signal

  • 3-axis magnetometer
  • computer control

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Computer Control - if magnetometer fails, will automatically transfer

- uses navigation link to obtain necessary ship position input data

- this info (lat/long, heading, roll, pitch) used by the computer to compensate for geographic magnetic variations.

- utilizes stored values for the magnetic readings for the geographic area ( magnetic maps).

- not a notable degradation

- won’t compensate for a local magnetic anomoly.

- big degradation is reliability

Manual Control - shifts to manual if both automatic control methods lost.