Heading control Control of the ship's heading
Track control Control of the ship's movement along a track
Heading monitor Monitoring the actual heading sensor by an independent second source
Position monitor Monitoring the actual position sensor by an independent second source
Main conning position Place on the bridge with a commanding view providing the necessary information and equipment for the conning officer to carry out his functions
Override function An intentional fast change-over from automatic to temporary manual control
Override facility A control to perform the override function
Curved track Non-straight track between two straight legs
Rate of turn Change of heading per time unit
Radius of turn Radius of a curved track
Leg A line between two way points
Track course The direction from one way point to the next
Cross track distance Perpendicular distance of the ship from the track
Cross track limit Maximum cross track distance before an alarm is activated
Back up navigator Any individual, generally an officer, who has been designated by the ships master to be on call if assistance is needed on the bridge
TO-waypoint The waypoint which the ship is approaching
FROM-waypoint The last passed waypoint
NEXT-waypoint The waypoint following the TO-waypoint
Wheel-over-line The line where the ship has to initiate a curved track
