NORTHROP GRUMMAN NAVITWIN IV, Operation, Installation And Service Manual

Page: 77 / 164

NAVITWIN IV 056360/E
Magnetic Compass Heading Calibration 6-5
Storing the magnetic compass heading calibration table
1. Call up the User Setup and go to ’Magn
Cal Tab | Enter Values’.
Press ENTER .
The calibration table entry screen is
shown.
2. Enter the previously determined correc-
tion values:
a) With the
Up/Down
arrow keys, select
the entry (’cal. no.’) to be edited.
b) Press
ENTER
to confirm the cal. no./
heading value
1
.
The cursor jumps to the ’diff.’ line.
c) Using the
Up/Down
and
Left/Right
arrow keys, enter the required cor-
rection value (’diff.’).
d) Press
ENTER
to confirm the correction
value.
e) To enter another correction value,
press
ENTER
again.
The cursor returns to the ’cal. no.’
line.
Repeat the procedure from step a)
above until all correction values have
been entered.
3. Press
MENU
to quit the table entry
screen.
1 The magnetic compass heading values are hard assigned to calibra-
tion numbers:
Entry 00 holds the correction value for a heading of 0°, entry 01 holds
the calibration value for a heading of 10° etc.
MAIN MENU
USER SETUP
MAGN CAL TAB
0°
Mag. Compass
Heading
Mag. Hdg.
Display
(uncalibrated)
Correction
Value
10°
USE CAL TABLE
ENTER VALUES
CAL NO.: 0 0
DEL CAL:
DIFF:
HEADING: 000
NO
CAL NO.: 0 0
DEL CAL:
DIFF:
HEADING: 000
NO