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GPSMAP 496 Owner’s Manual 139
Setting up and Using Sonar > Using the Sonar Page
Depth Line—adds a horizontal depth line across the screen that is
used to measure the depth of underwater objects. The depth of the
line appears in a box on the right side of the line. Press up or down
on the ROCKER to move the line on the Sonar Page.
Noise Reject
—helps lter unwanted noise from the Sonar Page.
The Noise Reject can be turned Off, set to Normal (automatically
adjusts for optimum viewing) or to a xed 1–100% setting. When
setting the Noise Reject, remember that a higher noise rejection
setting is less likely to show sh or structures.
Resizing the Split Screen
You can adjust the way the split screen is shown. This option is only
available when a zoom scale other than No Zoom is selected.
To resize the Sonar Page split screen:
1. From the Sonar Page split screen, press MENU.
2. Using the ROCKER , highlight Size Split, and press ENTER.
3. Move the horizontal double-arrow left or right using the ROCKER
until the vertical width line shows, then press ENTER.
4. If you want to cancel this operation, press QUIT or press MENU,
highlight Stop Resizing, and press ENTER.
Using the Pointer on the Sonar Page
You can show the pointer (arrow) to reference sonar items and
mark underwater waypoints. This makes it easier to nd and use an
object such as a stump for a future shing location. When using this
feature, the Sonar Page pauses. The depth continues to update while
the screen pauses, but the unit does not show any new sonar data
until the Sonar Page resumes scrolling.
To mark an underwater waypoint:
1. From the Sonar Page, press MENU, highlight Show Pointer, and
press ENTER.
2. Use the ROCKER to move the pointer to the location you want to
mark. Press ENTER. The New Map Waypoint Page appears.
3. To change the name, symbol, or depth, highlight the appropriate
eld and press ENTER. Make your changes, and press ENTER
when done.
4. When nished, highlight OK, and press ENTER.
5. To return to the standard Sonar Page, press QUIT; or press
MENU, highlight Hide Pointer, and press ENTER.