THD mode
  
  
  - Display the heading (HDG) of the ship
  
  
  
Speed mode 
  
  - 3-axis speed of the ship: Bow, Stern and longitudinal
  (non-IMO type only)
  
  
  ① Current 
  selected mode (SPD or THD), integrity status and common satellite
  ②   Transverse 
  speed at bow position
  ③   Longitudinal 
  speed 
  ④   Transverse speed at stern position
  
⑤   Distance travelled
 
  
  
  Navigational data 
  screen
  
  - 3-axis speed, as well as the Heading, Rate Of Turn and
  Course Over Ground can be Grasped at a glance 
  (non-IMO type only)
  
  
  
GPS integrity mode 
  
  - GNSS (GPS,Galileo,GLONASS*) satellites signal reception
  including signal strength and signal to noise Ratio
  - SBAS signal status 
  *Type approved with GPS only