so that the Accura 240 will add one foot to the depth, since the transducer is one foot below the surface. Press the right arrow key, then the up or down arrow keys until 1.0 appears in the "Adj Keel" box, as shown at right, then press the ENT key. This immedi- ately changes the digital depth display at the top of the screen by one foot. Press the EXIT key to erase this menu.
Note: Another way to use the keel offset feature is if you want to know the depth of the water below the lowest part of the boat, instead of the surface. To do this, measure the lowest part of the boat below the transducer. In this example, we'll use 3 feet. Now, using the keel offset feature, adjust the off- set for a negative 3 feet, as shown at right.
Please note that adjusting the keel offset only affects the digital depth display and all features that use the digital depth, such as the depth alarms and FishTrack. This doesn't affect the chart at all.
Calibrate Speed
You can calibrate the speed display. To do this, highlight the "Calibrate Speed" label on the "System Setup" menu, then press the right arrow key. A screen similar to the one at right appears.
If the digital speed display is slower than your actual speed, add a positive percentage to make it read faster. If
the digital speed display is faster, use a negative percentage to make it read slower. Use the arrow keys to change the speed, then press the ENT key. Press the EXIT key to erase this menu.
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