Figure 10: Principle Of Track Control - Raytheon NautoPilot NP 5100 Operator's Manual

Figure 10 below shows the principle of Track Control with adjusted data from a track
planning system.

Figure 10: Principle of Track Control

Track section
WPT
Track Section
TO--WPT
FROM--WPT
NEXT--WPT
WOL
Approach--Time
ECDIS
Control Parameters
4002.DOC010102
OPERATION
NautoPilot 5000 Series
FROM--WPT
current
WOL
ship's position
Waypoint
A track section is the route between two WPT.
Waypoint to be steered for. The WPT is considered as a
"TO--WPT" as long as the associated track change manoeuvre is
not terminated and the new track section has not been reached.
"FROM--WPT" is the previous waypoint.
"NEXT--WPT" is the waypoint following "TO--WPT".
Wheel--over--line. The line of the track where the
planned track change manoeuvre is intended to start.
The approach time is the time before the WOL when the
approach message is indicated on the NautoPilot Operator Unit.
Electronic Chart Display and Information System: Track planning
system; system for planning the track and for the input
of the WPTs.
Rate of Turn (R.o.T.)
24
NEXT--WPT
TO--WPT
WOL
Edition: September 2014