737 Flight Crew Operations Manual
Flight Management, Navigation -
FMC Preflight
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11.40.12 D6-27370-866-EGP
Blank if on the ground or if radio position is invalid in flight.
5 Groundspeed (GS)
Displays the ground speed for FMC and IRS.
Blank if ground speed of related system is invalid.
6 GPS L
Displays the latitude/longitude position as determined by the left GPS.
Blank if GPS position is invalid.
7 GPS R
Displays the latitude/longitude position as determined by the right GPS.
Blank if GPS position is invalid.
September 26, 2013