5-25 
 Procedures   1  Tracking a target for which ground fixed. 
 
2  Put the cursor on the tracked target, and press the [CLR / INFO] key. 
 
The cursor mode list will appear. 
 
3  Press the [8] key. 
 
The Property will appear. 
 
4  Press the [3] key. 
 
The reference target function will be set to on or off. 
 
  On      : A reference target is set.     
  Off    : The reference target is canceled. 
 
5  Put the cursor on the speed sensor switching (Own ship information 
②  on page 2-22), press the [ENT] key, and select    REF. . 
 
The speed of own ship calculated from the reference target will be displayed. 
 
When a reference target is set, the symbol display is changed to " 
R
 ". 
Only one target can be set as a reference target. 
When a new reference target is set, the previously set reference target is canceled. 
 
 
Note:
 If AIS function is set to on, the reference target function cannot be used.