User's Manual

NACOS Platinum
ED 3100 G 110 / 02 (2011-10)
Operating Instructions
A-7 Target Handling
A RADAR.fm / 10.11.11
A-72
7.12 Trial Manoeuvre
Trial manoeuvres are needed mainly for collision avoidance. In this process, a planned manoeuvre of the
own ship is simulated and the effect of this manoeuvre on the targets being tracked or plotted can be
checked in the PPI or in the chart area.
Before starting the manoeuvre simulation the present values for heading, course and speed as well as
the complete currently valid target scenario is taken as a start point
1)
.
The trial manoeuvre can be specified in an associated dialog by
- simulation of a course change, including the radius to be used
by the ship during the manoeuvre,
- the period of time up until the beginning of the simulated
manoeuvre (the Delay) and by
- simulation of a speed change at the instant of the manoeuvre.
The simulation itself is started when the Time bar at the bottom
of the dialog is operated.
There are two vector modes available, the Relative and the True
Trial Manoeuvre:
- The manoeuvre can be observed with relative or true vectors. As during normal operation, the
vector mode is to be set in the Vector & Trails group. This setting will also have an effect on the
trails and the past position plots before the manoeuvre function is started.
- In both of the vector modes, the manoeuvre radius that can be set and the acceleration
2)
for the
set speed-changes are taken into account additionally to the planned course change.
- At any time before or during the simulation, you can change between T and REL manoeuvre vector
mode, without changing other simulation parameters.
☞ The target tracking / plotting and the manual and automatic target acquisition are not interrupted
during the execution of a manoeuvre, but no new sleeping AIS targets can be activated manually.
This means also that the target list under Tools > Targets > List at all times displays the currently
valid data of the target tracking process and not the trial manoeuvre data.
☞ Contrary to targets already being tracked by the ARPA, radar targets which are in the state of
"under evaluation"
(i.e. being in "acquisition status) will not be taken into account for the trial
manoeuvre.
☞ As long as the Trial Manoeuvre is active, the Dangerous Targets function (ARPA and AIS) is auto-
matically On, independently of the settings under Settings > Targets > Dangerous Targets
and AUTO ACQ AIS Targets respectively.
☞ It is recommended to use the trial manoeuvre function in relative vector mode in order to evaluate
the change of the relative target data first.
If the true vectors are used, it is recommended to select a speed sensor with water stabilisation
(Set the stabilisation ,REF to Water in the Vector & Trails group).
1)
Start values for own ship's heading, course and speed are taken from the values shown in the sensor displays
on the permanent area. The course and speed data are depending on the selection of the CCRP.
2)
The min. and max. radius and the acceleration behaviour of the ship are entered at service level during setting-
to-work.