DA20-C1 Flight Manual
Supplement 13
Doc # DA202-C1 April 06, 2010 Page S13 - 21
D. GMU 44 Magnetometer
The GMU 44 magnetometer senses magnetic field information. Data is sent to the GRS
77 AHRS for processing to determine aircraft magnetic heading. This unit receives
power directly from the GRS 77 and communicates with the GRS 77 using an RS-485
digital interface.
E. GNS 430W GPS
The GNS 430W unit is a panel-mount GPS navigator with a color moving map. Position
and flight plan data are displayed on the GDU 620 MFD via RS-232 and ARINC 429
interfaces. GPS position information is also forwarded to the GRS 77 AHRS in order to
ensure normal AHRS operation. The GNS 430W also provides LOC/GS information for
display on the GDU 620 HSI via an ARINC 429 interface.
Revision 25 DOT Approved
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