DOWN ARROW to select MANUAL, then press MENU UP to display the RANGE SIZE menu. Use the arrow keys to select a desired depth range. When you're finished, press PWR to clear the menu from the display.
This unit has the following depth ranges: 10, 20, 40, 80, 160, 320 and 640 feet.
Range Size menu with manual depth range set to 40 feet. This in effect "zooms" or enlarges the display to show the water column from 0 to 40 feet deep. In this figure, the boat is in 57.5 feet of water, but only the top 40 feet of the water column is shown on the screen.
ZOOM
The zoom feature enlarges all images on the screen by doubling the size of the echoes (a 2X zoom). For example, if the current auto depth range is 0 to 60 feet, Zoom will show an enlarged view of the water column from 30 feet to 60 feet, always keeping the bottom in view.
To zoom the display, press the MENU key until the ZOOM menu appears. Press the UP ARROW key to select ON, then press PWR to clear the menu.
You can tell when the display is in Zoom mode because the top depth scale on the left of the screen will no longer show zero. For example, if the current range is 0 to 80 feet with zoom off, switching to zoom would enlarge the water column from 40 feet to 80 feet. The number 40 (instead of zero) would appear at the top of the depth range scale.
To turn the zoom feature off, press the MENU key until the ZOOM menu appears. Press the DOWN ARROW key to select OFF, then press PWR to clear the menu. The top of the depth range scale returns to zero.
NOTE:
Using the Zoom command while in auto depth Range Zoom mode will always enlarge the echoes near the bottom, because auto Range always keeps the bottom displayed in the lower portion of the screen.
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