Lowrance electronic 4000M - Manual (Page 91)

85
Reset Options
To reset all features to their factory defaults:
Press MENU | MENU |
↓ to
S YSTEM S ETUP
| ENT |
↓ to
R ESET O PTIONS
| ENT |
← to
Y ES
| ENT .
NOTE:
Reset Options does not erase any waypoints, routes, icons, plot trails or
sonar logs.
Reset Options command, left, and the Reset Options Menu, right.
Require DGPS
You can force the GlobalMap 4000M to require DGPS for reporting a
valid position. (The default setting, off, uses DGPS automatically when
an optional DGPS beacon receiver is connected. However, this auto
mode doesn't
require DGPS reception to yield a position.) Here's how to
turn mandatory DGPS on and off.
1. Press MENU | MENU |
↓ to
GPS S ETUP
| ENT |
↓ to
R EQUIRE DGPS | ENT .
2. To return to the last page displayed, press EXIT | EXIT .
3. You can return to this command and press ENT again to turn the fea-
ture off.