BENDIXKing AeroNav 910 Pilot's Manual page 304

AeroNav 900/880 Series Pilot's Guide
NOTE
OBS Leg Depiction on External Moving Maps
The depiction of the OBS course line on external
moving map displays may vary by device. Some
external displays may depict the OBS leg and some
may not. For example, in AeroNav software
releases prior to Release 10.1.1.0, the Avidyne
EX5000, EX500, and EX600 MFDs would not depict
the OBS course line/leg but do depict a 200nm OBS
course line/leg in Release 10.1.1.0 and later.
Changes can take up to 7 seconds to display on the
map and east-west legs may show some curvature.
NOTE
OBS Behavior in Dual AeroNav Operations
For those installations that include dual AeroNavs
that are separately wired to two different nav
indicators, the #2 AeroNav will automatically switch
into OBS mode when #1 AeroNav Nav Source has
been put into OBS and the #2 nav indicator will flag
invalid. This is because the FMS stays
synchronized between the two AeroNavs. The #2
AeroNav will display the selected course as set by
the #1 nav indicator on the map page.
6-12 Navigation
89000039-010
Rev 1 May 2019