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The GNC 300’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 way-
points. This is called the ‘offset distance’. The ‘increment distance’ is the distance
between each subsequent leg. Note that bearing and distance information are refer-
enced to the anchor waypoints. The ladder can be created on either side of the way-
points.
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.
Each time you pass the destination waypoint or one of its subsequent offsets, the leg
increment will be added to your present offset, and the route will be automatically
reversed. If a search and rescue is interrupted, note the parallel track direction (R or
L) and distance on the activation page for route 0. When you resume search and res-
cue operations, use this as the initial offset.
66
APPENDIX A
SUA Settings
SECTION
5
ROUTES
Search & Rescue
Operations
ANCHOR
WAYPOINT
ANCHOR
WAYPOINT
INITIAL
OFFSET
LEG
INCREMENT
DISTANCE
LEG
INCREMENT
DISTANCE
LEG
INCREMENT
DISTANCE
Performing a search and rescue operation.
300 7/14/98 8:50 AM Page 66