2ņ5 
ւ [FUNC] (Function Call) Key 
Calls predefined signal processing setting when pressed. 
The selection changes in the following sequence each time the key is pressed: 
  Function Off    o    Function 1    o    Function 2    o    Function 3    o    Function 4    o 
  Function Off   
Holding down the key for two seconds or more displays the function setting menu. 
oSee section 3.10. 
 
փ  [USER KEY1] (User Registration 1) Key 
Directly displays a pre-registered menu position when pressed. 
oSee section 3.5.19. 
 
ք  [USER KEY2] (User Registration 2) Key 
Directly displays a pre-registered menu position when pressed. 
oSee section 3.5.19. 
 
  [AZI MODE] [1] (Bearing Mode Select/1) Key 
Selects the North-up (true bearing), Head-up (relative bearing), or Course-up bearing display mode. 
This key serves as the numeric key 
[1] during menu operation. 
oSee section 3.5.7. 
 
  [MAP] [2] (Map Display/2) Key 
Selects whether to display charts, shorelines or depth contours on the radar map. 
This key serves as the numeric key 
[2] during menu operation. 
oFor displaying charts, see section 3.7. 
 
  [VECT R/T] [3] (Vector Mode/3) Control 
Selects the TT vector display mode (true/relative). 
This key serves as the numeric key 
[3] during menu operation. 
oSee section 5.1.7. 
 
  [TM/RM] [4] (True Motion/Relative Motion) Key 
Switches back and forth between the TM display mode and RM display mode. 
This key serves as the numeric key 
[4] during menu operation. 
oSee section 3.5.8. 
 
  [OFF CENT] [5] (Off Center/5) Key 
Shifts the own ship’s position within a desired direction (within 66% of the scope’s radius) from the 
scope’s center to expand the display portion. 
This key serves as the numeric key 
[5] during menu operation. 
oSee section 3.5.9. 
 
  [MARK] [6] (Mark/6) Key 
Displays a mark at an arbitrary position or erases the mark on the display. 
This key serves as the numeric key 
[6] during menu operation. 
oSee section 3.5.16. 
 
  [DAY/NIGHT] [7] (Day/Night Mode Select/7) Key 
Selects a preset color and brilliance of the display screen. 
This key serves as the numeric key 
[7] during menu operation. 
oSee section 3.3.4.