Chapter 3: Operation 3-27
The Time To Go (TTG) and Estimated Time of Arrival (ETA) data relate
to the target waypoint (not the whole route) and are based on the Speed
Over Ground (SOG) towards the target. If the VMG is negative, or data is
not available, these fields are replaced by dashes, one per character.
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 XTE is less than 0.01 on either side.
If no
GOTO or follow is in progress, the steering instruction is NO TARGET,
no steering arrows are shown, but the rhumb line indicator is shown.
The graphical XTE indication places arrows either side of the rhumb line
indicator and pointing towards it, dependent on the value of XTE. The
first arrow is shown when the XTE reaches 0.01nm, the second at.05nm
and subsequently at 0.1nm intervals.
Note: The steering instruction and graphical XTE indication are repeat-
ed on all text-only displays.
Navigation Data
The Navigation Data display comprises text data occupying the whole
screen (Figure 3-43):
Figure 3-43: Navigation Data Display
D4703_3
50°45.252 N
1°06.000 W (c)
COG 230° T
SOG 6.8 Kts
WAYPOINT 001
POSITION
STEER STARBOARD
BRG 234° T GPS FIX OK
RNG 2.4 nm TIME 14:32 12/12/99
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