T-45A UJPT, E2-C2, ADV, & IUT Eng-26
Engineering Review
3.
Mode control panel (compass controller)
a.
Function: panel contains controls and
circuitry that operate SAHRS/NGS
b.
Controls/switches/indicators
(1) Mode control switch used to select
desired mode of operation or OFF
(a) SLV (slaved): SSA gyro-
stabilized magnetic heading
as sensed by remote
compass transmitter
(b) DG (directional gyro):
heading referenced from
initial pilot-entered gyro
setting and not affected by
strong magnetic fields (e.g.,
polar regions)
(c) COMP: emergency mode--
heading as sensed by remote
compass transmitter without
SSA gyro-stabilization input
(2) Heading set knob used to set
compass heading in DG mode
only
(3) Latitude knob used to set operat-
ing latitude into SAHRS/NGS (DG
and SLV mode only)
(4) Located center instrument panel in
forward cockpit only
4.
Subsystem interfaces:
a.
Powered by 115 VAC essential bus
and 28 VDC essential services bus
Page 26-69
(8-03) Original
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