NorthStar 958 Operator's Manual page 162

Chapter 11 - Alarms, TideTrack, and Video Display
Page 154
to subtract a safety factor to allow for GPS or loran inaccu-
racy, then press the ENTER key.
Cross-track alarm
The cross-track alarm will signal if your vessel moves beyond a
certain distance from the desired track line. You can turn the
cross-track alarm on or off, and set the distance from the track
line. The default setting is 0.10 nautical miles (about 600 feet).
You can set the cross track to as little as 0.01 nm (about 60
feet).
To set the cross-track alarm:
1. Press the CURSOR PAD to highlight CROSS TRACK, then
press the EDIT ALARM menu key.
2. Press the CURSOR PAD to turn the alarm to ON.
3. To set the cross-track distance limit, press the CURSOR
PAD right, and use the KEYPAD to enter the distance,
then press the ENTER key.
Arrive radius
The arrive radius is a circle around your current active
waypoint. The default setting for the radius is 0.20 nautical
miles, or about 1200 feet. You can set the radius to as little as
0.01 nm.
There are two alarms triggered by the arrive radius. If you're
following a route and have chosen automatic waypoint
switching, entering the radius makes the 958 switch to the
next leg and display the CHANGING alarm icon. If there are no
more waypoints in the route, or if you've chosen manual
waypoint switching, then entering the radius triggers the
arrive alarm.
Note: Automatic waypoint switching will also occur if you
cross the perpendicular at the end of the current leg.
958 Operator's Manual, Rev. A