NorthStar 961 Reference Manual page 247

Erasing your entire
Erasing selected
waypoints
961/962 Operations and Reference Manual, Rev. A
To permanently erase the entire trip:
1. At the TRIP screen, press the ERASURES key (you don't
trip
have to select a particular point).
2. Press ERASE ENTIRE TRIP.
The entire trip is erased, and the TRIP screen appears.
Your last known position is placed into the trip. Any
current waypoint navigation will cease.
To permanently erase all the trip points before the selected
one, but not the selected one:
1. At the TRIP screen, select the point at which all other
points before it will be erased, then press the ERASURES
key.
2. Press the ERASE BEFORE key.
All the selected trip points are erased, and the TRIP
screen appears.
Chapter 11 - Using the Trip Function
Erasures dialog box
Page 11-13