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Garmin GNC 250 Manual

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The GNC 250’s search and rescue function provides navigation guidance for
search and rescue operations, navigating in a ladder pattern to maximize coverage and
efficiency. This is done in reference to two waypoints called ‘anchor waypoints’. The
first leg will be a specified distance from the line connecting the anchor waypoints.
This is called the ‘offset distance’. The ‘increment distance’ is the distance between
each subsequent leg. The ladder can be created on either side of the waypoints.
To perform a search and rescue operation:
1. Create a route of only two waypoints.
2. Press
R
and use
O
to display the route catalog page.
3. Use
K
to select the 2-waypoint route.
4. Press
C
twice and use
K
to display ‘search?’. Press
E
.
5. Use
K
and
O
to enter the leg increment value and R or L. Press
E
.
6. Rotate
O
to highlight the initial offset, and use
K
and
O
to enter the initial offset
value, and R or L.
7. Press
E
three times to accept the operation values and begin navigation.
After activating a search and rescue, you will be informed with an ‘Offset nav in
effect’ message each time you traverse the route offset from the anchor waypoints.
Once you’ve arrived at the destination waypoint, the leg increment will be added to
your present offset, and the route will be automatically reversed. If a search and res-
cue is interrupted, note the parallel track direction (R or L) and distance on the cata-
log page for route 0. When you resume search and rescue operations, use this as the
initial offset.
65
APPENDIX A
Navigation Units
Performing a search and rescue operation.
SECTION
5
ROUTES
Search & Rescue
Operations
250 real 7/14/98 9:33 AM Page 65
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