Track Change Manoeuvre - Raytheon NautoPilot NP 5100 Operator's Manual

1.4.5.1.3

Track Change Manoeuvre

(see Figure 15)
Attention!
The track change manoeuvres are planned and checked on the ECDIS. No check
within the Autopilot takes place. A limitation, however, is incorporated.
If a non- -realizable small radius is transmitted to the Autopilot, this may lead
to hard- -over rudder positions!
On planning the routes, attention is to be paid to the fact that from the end of the radius
of a track change manoeuvre to the beginning of the radius of the next track change ma-
noeuvre at least 350 m are to be planned. This distance is required to bring the ship to
the necessary rate of turn. The minimum distance between both radii depends on the
vessels manoeuvrability.
If this is not the case, the result may be that the planned radii cannot be realized. This
will be signalized on the operator unit by the error message "Track Ctrl. Interr." (Track
Control Interrupted) and a continuous audible alarm (see section 1.4.5.1.7.4).
Figure 15: Procedure of the Track Change Manoeuvre (Example)
WPT 1
The following alert will be displayed on the ECDIS only for NP5100, NP5300 and
NP5400 (also refer to ECDIS manual). For the NP5500 the alert will be displayed on the
ECDIS as well as on the Autopilot.
Edition: September 2014
OPERATION
NautoPilot 5000 Series
WOL
Approach
alarm
30 s before WOL
Message:
Track Chng. xxx
33
During track change
Message:
Track Chng. xxx
WPT 2
End of track change
Message:
New Track xxx
30 s
AUTOPILOT
WPT 3
4002.DOC010102