SPZ--8000 Digital Integrated Flight Control System
A28--1146--055
REV 2
A--7
LASEREF
R
II/III Inertial Reference System (IRS)
INERTIAL SYSTEM DISPLAY UNIT (ISDU)
The ISDU, shown in Figure A--3, is used to enter the aircraft’s present
position directly to any of the installed IRUs. It also displays several IRS
parameters. It is intended as a backup interface to the IRS systems.
Inertial Reference System Display Unit
Figure A--3
NOTES: 1. Normally, present position is input to the on--board IRS
through the FMS.
2. Each IRS is controlled by its respective MSU.
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