Lowrance lms-522c igps 操作ガイド

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3. All the menus are cleared and the unit reverts to the Map Page at 

the 4000 mile zoom range, just as if you had turned it on for the first 

time. All options have been returned to the factory settings. 

 

 

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

sonar logs. 

The sonar chart's Digital Data display option includes a box that shows 

distance traveled, called Water 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 the 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 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.