GPS Receiver Owner's Manual
Table Of Contents
- Introduction
- Getting Started
- Using Charts
- Using the Navigation Chart
- Changing the Navigation Chart Settings
- Using the Split Navigation Chart
- Using Perspective 3D
- Using Mariner’s Eye 3D
- Using Fish Eye 3D
- Using Fishing Charts
- Enabling High Resolution Satellite Imagery
- Viewing Aerial Photos
- Viewing Current-station Information
- Detailed Road and POI Data
- Using Automatic Guidance
- Using the Chart/Sonar Screen
- Where To?
- Viewing Information
- Configuring the Chartplotter
- Using Sonar
- Using Digital Selective Calling (DSC)
- Using XM WX Weather and Audio
- Appendix
- Index

GPSMAP 400/500 Series Owner’s Manual 49
Using Sonar
Zoom—zoom in to a section of the full screen. The zoom is off, or
set to No Zoom by default. Four options are available:
No Zoom—turns zooming off.
2x Zoom—twice the magnication.
4x Zoom—four times the magnication.
Bottom Lock
—locks the zoom window to the bottom.
Split Zoom—displays the Split Zoom screen (page 46).
Depth Line
—quickly reference a specic depth (Show or Hide). To
set the depth of the reference line, select Show, and then press up or
down on the Rocker.
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