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Depth Range Zoom
When turned on, the unit automatically adjusts the depth
range according to water conditions. When in auto range
mode, it always keeps the bottom displayed in the lower
portion of the screen. You can over-ride the automatic depth
range control and manually select a depth range.
To do this, press
MENU until the RANGE ZOOM menu appears. Press the
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). 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.
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.