Garmin GPSMAP 238 Sounder - Manual (Page 44)

34
Reference
Sonar Page:
Adjustment Menu
To change a setting back to ‘Normal’ or ‘Auto’:
1. On the adjustment window for the desired option, press MENU.
2. Select the desired setting and press ENTER.
Adjustment Menu Options
Range— sets the display depth range used for viewing. The unit can be set to automatically track
the bottom or set to a user-specifi ed depth range. Auto mode displays the most information pos-
sible while continuously showing the bottom.
Zoom— used to quickly select a display zoom scale or split the display. When a scale other than
‘No Zoom’ is selected, the Adjustment Menu displays a new selection labeled ‘View.’ The Zoom
setting is divided into six display levels:
• 2X Split: shows two reduced-size sonar pictures at the same time. The right half of the display
screen shows the complete sonar picture at its original scale. The left half shows a portion of the
original picture at 1/2 depth scale.
• 2X Zoom: displays the 2X zoomed picture on the full screen and does not show the original
depth scale.
• 4X Split: shows two reduced pictures; the right at the original depth scale and the left at 1/4 the
original depth scale.
• 4X Zoom: displays only the 4X zoomed picture on the full screen. However, if ‘Dual Frequency
Display’ is set to ‘Split’, then a 50/200kHz split screen will be displayed.
• Btm (Bottom) Split: shows two reduced pictures; the right at the original depth scale and the
left showing sonar returns from the bottom up. All target depths will read as a distance form the
bottom.
• Btm (Bottom) Lock: displays only the Bottom Lock picture (returns from the bottom up) on the
full screen. However, if ‘Dual Frequency Display’ is set to ‘Split’, then a 50/200kHz split screen
will be displayed.
4X Split Zoom Display (Dual Frequency Mode)
Range Adjustment
Zoom Adjustment
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