Garmin GTN 625, Reference Manual

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190-01004-04 Rev. N GTN 625/635/650 Cockpit Reference Guide
Me
ssage
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Message Description Action
VISUAL
APPROACH
NOT ACTIVE -
Approach guidance
not available when
requesting
Direct-To runway.
Visual approach could
not transition to
active. Guidance is not
available.
Reactivate the approach or cancel
the Direct-To course.
VLOC RECEIVER -
Navigation receiver
has failed.
The NAV radio is
not communicating
property with the
system.
Use GPS based navigation. Contact
dealer for service.
VLOC RECEIVER -
Navigation receiver
needs service.
The NAV radio is
reporting to the GTN
that it needs service.
The NAV radio may
continue to function.
Use GPS based navigation. Contact
dealer for service.
VNAV -
Unable
to reach vertical
waypoint.
The current altitude
constraint cannot be
reached based on the
current ground speed
and vertical speed.
Adjust the aircraft attitude as
appropriate to attempt to intercept
the vertical path.
VNAV -
Unavailable.
Upcoming flight
plan leg not
supported.
The lateral flight plan
contains a procedure
turn, vector, or other
unsupported leg type
prior to the active
vertical waypoint. This
prevents vertical path
guidance to the active
vertical waypoint. Treat the portion of the flight
plan before the affected leg and
after the affected leg as separate
vertical profiles. The GTN cannot
guide the pilot between the two
segments automatically.
VNAV -
Unavailable.
Excessive
crosstrack error.
The current crosstrack
exceeds the limit,
causing vertical path
guidance to go invalid. To correct this, navigate within
10 nm of the centerline of the
flight plan or edit the flight plan
as appropriate to allow for vertical
navigation.