TM 1-1520-238-MTF
Change 5
4-18
K. AUTOMATIC TADS GYRO ALIGNMENT.
NOTE
This procedure is used for automatically
aligning the gyros. The TADS inertial axis is
aligned with the optical axis to eliminate po-
tential pitch and yaw disturbances. This task
is to be performed after replacement of the
TEU, DSA roll/pitch/yaw gyros and the
TADS turret.
1. FOV – N.
2. TADS – TV.
3. SLAVE switch – SLAVE to bring TADS turret out
of fixed forward position. –49 Set DEK-FD/LS
then press mid shift key and enter B32. –51
CDU FAD-FDLS then type B32 in the
scratchpad.
4. SLAVE switch – Unslave.
NOTE
Shortly after ALIGNMENT IN PROG-
RESS message appears, the TADS turret
will begin vertical and lateral motions,
then stop. System will enter manual track
mode when bite target appears on dis-
play. The bite target is displayed by a
white rectangle above the letters PR of
the ALIGNMENT IN PROGRESS mes-
sage. The presence of the white rectan-
gle indicates the system is waiting for the
next portion of the alignment procedure.
Pitch and yaw gyro alignment is normally
performed airborne, but may be per-
formed on the ground if a suitable target
is available. The target is required to be
at an up or down elevation greater than
25 degrees from zero.
5. Trackable target – Acquire.
