RANGE - Upper and Lower Limits
You can change the upper and lower range limits when the unit is in the manual mode. This lets you "zoom" in on segments of the water as small as 10 feet. In other words, you can set the upper limit to 25 feet and the lower limit to 35 feet, regardless of the bottom depth. This in essence, gives you a 10 foot zoom. You can choose any segment of the water, as long as the distance between the upper limit and lower limit is 10 feet (10 meters) or more.
To change the upper limit, first make certain the unit is in the manual mode. Next, press a menu key until the "UPPER LIMIT" menu appears. Now press the down arrow key to increase the upper limit or the up arrow key to decrease it. After you've finished, wait a few seconds and the menu will scroll off the screen’s left side. Pressing the PWR key also clears it.
21 FOOT UPPER LIMIT
To change the lower limit, again make certain the unit is in the manual mode. Press a menu key until the "LOWER LIMIT" menu appears. Now press the down arrow key to increase the lower limit or the up arrow key to decrease it. When you have the limit set, wait a few seconds and the menu will scroll off the screen’s left side. Pressing the PWR/CLEAR key also clears it.
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