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Reference
Sonar Page Options
‘Show Pointer’ option enabled
Data Window
Pointer
‘Show Numbers’
option enabled
• Show/Hide Pointer — allows you to reference sonar items and mark underwater waypoints.
This makes it easier to fi nd and use an object such as a stump for a future fi shing location. When
using this feature, the Sonar Page pauses. The pointer does not move off the paused display and
cannot show an area that has scrolled off the screen. The depth is updated while the display is
paused, but the unit does not show any new sonar data until the standard Sonar Page is resumed.
You may see a discontinuity from where the sonar information stops to where it starts again.
To mark an underwater waypoint:
1. From the Sonar Page, press MENU, highlight ‘Show Pointer’ and press ENTER to pause the screen
movement.
2. Use the ARROW KEYPAD to move the cursor onto the target (underwater drop off, stump, etc.)
you want to mark. The data window at the top of the screen displays the cursor’s depth, coordi-
nates, and bearing and distance from your current position.
3. Press ENTER/MARK. The New Waypoint page appears with the waypoint’s coordinates, default
three-digit name, and pointer depth automatically fi lled in.
4. To change the name, symbol or depth, highlight the appropriate fi eld and press ENTER. Make your
changes and press ENTER when done.
5. When done, move the fi eld highlight back to the ‘OK’ prompt and press ENTER.
6. To return to the standard Sonar Page, press QUIT; or press MENU, then highlight ‘Hide Pointer’
and press ENTER.
• Show/Hide Numbers — toggles showing/hiding the data fi elds on the sonar display.
• Size Split — enables width adjustment of the Sonar Page split screen. This option is only
available when a split screen zoom scale is selected. You may adjust the size of the split window
anywhere from 1/4 to 3/4 width of the right half of the Sonar Page.
To resize the Sonar Page split screen:
1. From the Sonar Page split screen, press MENU.
2. Using the ARROW KEYPAD, highlight ‘Size Split’ and press ENTER.
GPSMAP178CManual.indd 37 3/19/2004, 3:10:14 PM