Lowrance 5150c 操作ガイド

77 

UTM's are marked on USGS topographic charts. This system divides 

the Earth into 60 zones, each 6 degrees wide in longitude. 
British, Irish, Finnish, German, New Zealand, Swedish, Swiss, Taiwan, 

and Greek grid systems are the national coordinate system used only in 

their respective countries. In order to use these grid systems, you must 

be in the respective country. This unit will pick the matching datum for 

you when you select the grid. See the entry on Map Datum Selection for 

more information. 
The Military Grid Reference System (MGRS) uses two grid lettering 

schemes, which are referred to as standard and standard + 10 MGRS 

on this unit. Your position and datum in use determines which one to 

use. If you use standard, and your position is off significantly, then try 

the alternate. 
NOTE: When the position format is changed, it affects the way all posi-

tions are shown on all screens. This includes waypoints. 
To change the coordinate system, press 

 while 

 is 

highlighted. Press 

↑ or ↓ to highlight the desired format. Press 

 to 

select it. Press 

 to erase the menus. 

If the Loran TD conversion is chosen, you must enter the local Lo-

ran chain identification for the master and slaves. Do this by select-

ing "Setup Loran TD" at the bottom of the "Coordinate System" 

menu and select the ID. Press 

 to erase this menu.