Lowrance lcx-112c 操作指南

 

152

The distance from your current position to the smaller ring (the ring's 

radius) is 25 miles. With the arrow keys and map cursor, you can scroll 
the map to see the third and fourth rings. In this example, the distance 

to the third ring is 75 miles and distance to the fourth ring is 100 miles 

from your current position. 

To set range rings: Press 

↓ to 

. With the option 

highlighted, press 

ENT 

to check it (turn on) or uncheck it (turn off). 

After the option is set, press 

|

 to return to the page display. 

To set Lat/Long Grid: Press 

↓

 to 

. With the option 

highlighted, press 

ENT 

to check it (turn on) or uncheck it (turn off). After 

the option is set, press 

|

 to return to the page display. 

Maps and charts are based on a survey of the area that's covered by the 

map or chart. These surveys are called "Datum."  
Maps that are created using different data will show the same latitude/longitude 
in slightly different locations. 
All data are named. The GPS system is based on the WGS-84 datum, 

which covers the entire world. Other data may also cover the entire world, 
or just a small portion of it. By default, your unit uses the WGS-84 datum. 

To change the datum: 
1. Press 

|

|

↓

 to 

|

|

↓

 to 

|

 

2. Scroll 

↓

 or 

↑

 to select the desired datum, then press 

ENT. 

3. 

To return to the last page displayed, press

 EXIT

|

 

A list of the data used by this unit is in the back of this manual.