Magnetic Variation - Garmin GTN 725 Cockpit Reference Manual

Message
LOCKED FLIGHT PLAN-
Cannot activate a
fl ight plan containing a
locked waypoint.
LOSS OF INTEGRITY
(LOI)-
Verify GPS position
with other navigation
equipment.

MAGNETIC VARIATION-

Aircraft in area with
large mag var. Verify all
course angles.
NAV ANGLE-
NAV Angles are
referenced to True
North (T).
NAV ANGLE-
NAV Angles are
referenced to a User set
value (U).
NON-WGS84
WAYPOINT-
See CRG. Location may
be different than where
surveyed for [WPT].
46
Description
The user is trying to
activate a fl ight plan
that contains a locked
waypoint.
The GPS module has
reported a loss of
integrity.
MagVar is fl agged as
unreliable in the MagVar
database. This normally
occurs when operating
at high latitudes that do
not support a NAV Angle
of Magnetic.
NAV angle is set to True. No action is necessary;
NAV angle is set to User. No action is necessary;
The active waypoint is
not referenced to the
WGS84 datum. See
Note 1 following this
table.
GTN 725/750 Cockpit Reference Guide (CRG)
Action
Unlock the fl ight plan by
modifying stored fl ight plans
as necessary to include
waypoints, procedures,
and airways that are in the
current navigation database.
Use a different GPS receiver
or a non-GPS based source
of navigation. Contact dealer
for service if this message
persists.
Verify that the geographical
region supports navigation
based on magnetic variation.
message is informational
only.
message is informational
only.
No action is necessary;
message is informational
only.
190-01007-04 Rev. B