3-24 Raychart 425 Chartplotter
CDI Display
The CDI display shows Cross Track Error (XTE) and distance to
waypoint presented in a ‘runway’ format (Figure 3-40):
Figure 3-40: CDI Display
The ‘runway’ represents a 0.3nm width with the vessel symbol shown at
the bottom. Bearing to Waypoint, Distance to Waypoint, Time to Go
(TTG), Course Over Ground (COG) and Speed Over Ground (SOG) are
also shown. Time to Go is calculated on the basis of distance to
destination and Speed Over Ground (SOG) towards the destination.
At waypoint ranges greater than 4nm, the symbol remains at the top of
the screen. As the waypoint range falls below 4nm, the symbol moves
down the centre line.
The checkered pattern moves down the screen to simulate movement
when SOG is greater than 2 knots.
The steering instruction is
STEER STARBOARD if the XTE is 0.01nm or
more to port,
STEER PORT if the XTE is 0.01nm or more to starboard or ON
COURSE
if the XTE is less than 0.01 on either side. If no GOTO or follow
is in progress, the steering instruction is
NO TARGET.
The graphical XTE indication places arrows either side of the steering
instruction and pointing towards it, dependent on the value of XTE.
D4700_1
To Next Page
Loading...
Need help?
General