T-45C TS, ADV & IUT ENG-19
Flight Instruments
(4) The GPS and inertial system navigation
data is sent to the DEU, Yaw Damper
Controller (YDC), Mission Data Loader
(MDL) and the VOR/ILS/MB receiver over
the MIL-STD-1553B MUX BUS
c.
Controls/switches/indicators:
(1) GINA PWR controlled by push-button on
MFD BIT display; GINA PWR initializes to
on
(2) Four (4) operational modes
(a) HYBD (hybrid) mode, the most
accurate mode. Attitude and position
data provided by inertial system and
GPS. Automatically selected on initial
power-up and weight-on-wheels or
manually from the ADI display
(b) GPS mode, position data provided
solely by embedded GPS receiver,
manually selected from the ADI display
(c) INS mode, navigational data provided
solely by navigation assembly,
automatically selectedwhen in HYBD or
GPS and GPS fails or manually when
selected from ADI display
d)
DGRO (directional gyro), an attitude
heading backup mode, automatically
commanded when insufficient
initialization data and the parking brake
is not set during ground alignment or
manually when selected from ACFT
DATA display
(3) GINA alignments
(a) Two stages of alignment, coarse and
complete/fine
Original (9-98)
Page 19-5
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