WATER
DIS-

NOTE:

Reset Options does not erase any waypoints, routes, plot trails, or sonar logs.

Reset Water Distance

The sonar chart's Digital Data display option includes a window that shows distance traveled, called Water Distance ("W Distance"). This information is calculated from an optional water speed sensor, not the GPS. The Water Distance window can be reset to zero using the Reset Water Distance command.

Press MENUMENUto SONAR SETUPENTto RESET

TANCEENT. The menus are cleared and the water distance is reset to 0.00.

Set Keel Offset

This unit measures water depth from the face of the transducer. Since the transducer is installed below the water surface, the distance dis- played by the digital depth, chart depth scale, chart cursor or fish sym- bols is not the exact water depth. If the transducer is 1 foot below the surface, and the screen shows the water depth as 30 feet, then the ac- tual depth is 31 feet.

On sailboats or other large vessels with deep drafts, the distance be- tween the transducer installation and the keel or lower engine unit can be several feet. In those cases, an inexact depth reading could result in grounding or striking underwater structure. The Keel Offset feature eliminates the need for the navigator to mentally calculate how much water is under his keel.

Keel Offset lets you calibrate the digital depth: chart depth scale, chart cursor depth and fish symbol depth displayed on the screen. To calibrate the depth indicators, first measure the distance from the face of the transducer to the lowest part of the boat. In this example, we will use 3.5 feet. This will entered as a negative 3.5 feet, which makes the depth indi- cators perform as if the transducer's lower in the water than it really is.

1.Press MENUMENUto SET KEEL OFFSETENT.

2.The Keel Offset dialog box appears. Press to change the plus (+) sign to a minus (–) sign.

3.Press to the first number, then press to change the number to 3

4.Press to the second number, then press to change the number to 5, then press EXIT. The depth indicators now accurately show the depth of water beneath the keel.

NOTE:

If knowing the exact depth of water beneath the keel is less important,

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Eagle Electronics 320, 320DF manual Reset Water Distance, Set Keel Offset, Press MENUMENU↓ to SET Keel Offsetent

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