23 
  [VECT R / T / 3] (Vector mode / 3) 
Use this key to switch vector indication    T   (true vector) /  R  (relative vector). 
During the menu operation, the key functions as a numeric key [3]. 
 
 
24 
  [TM / RM / 4] (True Motion / Relative Motion / 4) key 
Use this key to switch the motion mode between    TM    (true motion) and    RM    (relative motion). 
If the key is pressed for 2 seconds in    TM , the own ship's position is reset. 
During the menu operation, the key functions as a numeric key [4]. 
 
 
25 
  [OFF CENT / 5] (Off-center / 5) key 
By pressing this key, moving the cursor, and pressing the [ENT] key, the ship's position can be moved 
to the cursor position.    The moving range is about 66% of the radius. 
If the key is pressed for 2 seconds, the off-center is set to Off and the ship's position is returned to the 
center of the screen. 
During the menu operation, the key functions as a numeric key [5]. 
 
 
26 
  [MARK / 6] (Mark / 6) key 
Use this key to display a mark in any screen position.    This key can also be used for clearing the mark 
that is currently displayed. 
If the key is pressed for 2 seconds, the Mark Setting menu is opened. 
During the menu operation, the key functions as a numeric key [6]. 
 
 
27 
  [DAY / NIGHT / 7] (Day / night mode / 7) key 
Use this key to switch the color and brightness of the screen that have been set in advance. 
If the key is pressed for 2 seconds, the Display Color Setting menu is opened.     
During the menu operation, the key functions as a numeric key [7]. 
 
 
28 
  [RR / HL / 8] (Range Rings / ship's heading line off / 8) key 
Use this key to set the range rings marker to On / Off. 
If the key is pressed for 2 seconds, the ship's heading line is cleared while the key is pressed. 
During the menu operation, the key functions as a numeric key [8]. 
 
 
29 
  [AZ / 9] (Automatic Acquisition / Activation Zone / 9) key 
Use this key to set automatic acquisition / activation zone. 
If the key is pressed for 2 seconds, the AZ Menu (automatic acquisition / activation zone menu) is 
opened. 
During the menu operation, the key functions as a numeric key [9]. 
 
 
30 
  [TRAILS / 0] (Radar trails / 0) key 
Use this key to switch the length of the radar trail period. 
If the key is pressed for 2 seconds, the RADAR Trails setting menu is opened. 
If this key is pressed for 5 seconds, the radar trail is cleared. 
During the menu operation, the key functions as a numeric key [0]. 
 
 
31 
  [RADAR Menu] (Main menu) key 
Use this key to open the Main Menu. 
 
 
32 
 [TT Menu] key 
Use this key to open the TT Menu (target tracking menu). 
 
 
33 
/
 
34 
    [RANGE + / - ] key 
Press the [+] key to increase the observation range and the [-] key to reduce the observation range. 
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