User's Manual

Table Of Contents
NACOS Platinum
ED 3100 G 110 / 02 (2011-10)
Operating Instructions
A-7 Target Handling
A RADAR.fm / 10.11.11
A-76
Checking the Trial Manoeuvre in True Vector Mode
In True Vector Mode, the trial manoeuvre is displayed with true vectors for the targets and own ship.
Both the radius planned for the course change manoeuvre and the acceleration behaviour for the speed
change that is set and the delay are taken into account. All settings made in REL vector Mode can still
be changed in the True Vector Mode.
Switch-On of the True Vector Mode
The switch-over between True and REL Vector Mode is performed in the Vector & Trails group by
clicking on the REL or T selection button.
It is possible at any time to switch between the two vector modes without any loss of data or infor-
mation. In both modes the same state of the manoeuvre is shown on the screen, if no other trial
manoeuvre setting is changed.
It is recommended to use the true trial manoeuvre together with a speed sensor giving speed
through water. This can be selected as in normal operation mode of the system by selecting REF
Water instead of REF Ground in the Vector & Trails group.
Whenever it is not sure that the calculated data or the used sensor data are correct and stable, it
is recommended to perform the Trial Manoeuvre in REL mode (see above).
As a result of the switch-over into True Vector Mode, the following changes occur:
- True vectors and true target trails are displayed. Past positions of targets remain invisible as long
as the Trial Manoeuvre is running.
- Own ship and all targets are shown at their currently existing positions with their true vectors as
long as the Time value is set to 0:00 min.
- The trial manoeuvre line is displayed. It represents the track on which the ship would perform the
simulated manoeuvre. The Radius displayed in the manoeuvre dialog is taken into account for
calculation of the course change.
The simulated manoeuvre-settings can now be changed in the same way as described above for the rela-
tive manoeuvre mode:
Use the Course, Speed, Radius or Delay slider to set the desired parameters with which the
manoeuvre is to be simulated and move the Time slider to see the future development of the scenario.
Checking the Trial Manoeuvre
By means of Time, the instant of time that is to be considered can be set:
- Click on the Time bar slider and, with the trackball, vary the time instant that is to be displayed
- or -
- click before the slider to produce 10 sec time increments stepwise.
By continuous variation, a synchronised display of the simulated own ship positions and target positions
takes place. If, for all time values, an adequate distance between own ship symbol and the target symbol
is displayed, the trial manoeuvre will not show a dangerous approach.
Also during the true trial manoeuvre the collision calculations
1)
take place, which would indicate a
dangerous target symbol in red colour as soon as the anti-collision limits are infringed.
If necessary, any of the trial manoeuvre settings can now be changed and the check can be repeated.
1)
The collision calculations of the trial manoeuvre simulation implement the same alarm limits for CPA and TCPA as
set for the normal target tracking in the Dangerous Targets group of the Settings > Targets menu.