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TM 55-1905-220-14-11
5-116. REMOTE MAGNETIC HEADING COMPASS (RMHS)- MAINTENANCE
INSTRUCTIONS.
This task covers:
a. Adjust/Calibration
b. Replace
INITIAL SETUP
Test Equipment
References
Paragraph
NONE
3-217
Remote Magnetic Heading
Compass Organizational
Maintenance
Equipment
Special Tools
Condition
Condition Description
NONE
NONE
Material/Parts
Special Environmental Conditions
NONE
NONE
Personnel Required
General Safety Instructions
1
Observe WARNING in this procedure.
LOCATION
ITEM
ACTION
REMARKS
ADJUST-CALIBRATION
1. Index Error.
A periodic vehicle swing is used to check calibration of the RMHS. The vehicle swing is recommended at 1-year
intervals or sooner if the RMHS calibration is suspect.  Refer to publication, H.O.226 Handbook of Magnetic
Compass Adjustment, for additional information.
NOTE
All readings are relative to the magnetic North pole.
(a) Align the vehicle to a magnetic 000-degree heading. Subtract heading of vehicle from Heading Indicator
reading. Record difference.
(b) Repeat step (a) for 090-, 180-, and 270 degree headings.
5-1300

 


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