Lowrance x510c ユーザーズマニュアル

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There are four "basic" Main Menu commands that you'll really want to 

read more about. They are: 
• Screen: changes the contrast or brightness of the display screen. Use 

this command to adjust how the screen looks under various lighting 

conditions. 
• Sounds: enables or disables the sounds for key strokes and alarms, 

controls the volume and sets the alarm style. If you don't like to hear a 

beep each time you press a key, you can turn this off, or select tunes or 

sound effects instead. The sounds are especially useful when used with 
the Fish I.D.

™ fish symbol feature and fish alarm feature. 

• Sonar Alarms: turns alarms on or off and changes alarm thresholds. 

The fish alarm, used with Fish I.D., is the most popular use. It tells you 

when the sonar sees a fish. You can also set deep or shallow depth 

alarms and zone alarms. 
• Popup Help: turns the pop-up help boxes on or off. When you select 

a menu command, these information boxes appear to tell you what the 

command does or how to use the command. The default setting is on, 

which is really handy while you're learning. 
The remaining Main Menu commands are for more advanced functions, 

mostly setting various sonar options. (They're all detailed in Sec. 4.) 
• Transparency: adjust the level of transparency for menus. 
Units of Measure: selects the units of measure used for showing 

speed/distance, depth and temperature. 
• Set Keel Offset: calibrates the unit to show depth under the keel or 

actual depth from the surface.