Lowrance lcx-112c 操作ガイド

 

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

logs. 

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 

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↓ to 

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↓ to 

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

This unit measures water depth from the face of the transducer. Since the 

transducer is installed below the water surface, the depth displayed by the 

digital depth, chart depth scale, chart cursor or fish symbols is not exact. If 
the transducer is 1 foot below the surface, and the screen shows the water 

depth as 30 feet, then the actual depth is 31 feet. 
On sailboats or other large vessels with deep drafts, the distance between 
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 

enter as a negative 3.5 feet, which makes the depth indicators perform as if 
the transducer's lower in the water than it really is.