TM 5-6675-328-14
10-6.3 Altimeter/Barometer.
a.
Determine altitude.
(1)
Remove altimeter/barometer from case and hold in horizontal position. S_
(2)
Set outer scale by turning rim until the known control altitude is set under needle and return to case.
(3)
Proceed to station where altitude is to be measured, hold altimeter/ barometer horizontally, and record
altitude opposite needle.
b.
Determine barometric pressure by reading inner scale underneath needle and applying temperature correction.
(1)
For every 10F (6C) above 50F (10C), add 2% to reading.
(2)
For every 10°F (6C) below 50F (10C), deduct 2% from reading.
10-20
