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6.5Mode and Length of Vectors
True or relative vector (vector mode)
Target vectors are displayed relative to own ships reading (Relative) or with reference to North (True). Own ship does not have a vec- tor in relative mode.
Vector length
From the
The vector tip shows an estimated position of the target after the selected vector time elapses. It can be valuable to extend the vec- tor length to evaluate the risk of collision with any target.
6.6 Past Position Display
The Auto Plotter displays equally
If a target changes its speed, the spacing will be uneven. If it changes course, its plotted course will not be a straight line in TM mode.
To turn past position display an or off do the following:
1.Open the
2.Select History.
3.Select plot enterval among 15, 30 sec- onds, 1, 2, 3 or 6 minutes. Select OFF to erose the past position display.
4.Press the [ACQ/ENTER] key.
5.Press the [MENU] key.
6.7 Operational Warnings
There are two main situations which cause the
CPA/TCPA alarm
Lost target alarm
CPA/TCPA alarm
CAUTION
The CPA/TCPA alarm feature should never be relied upon as a sole means for detecting the risk of collision.
The navigator is not relieved of the responsibility to keep visual lookout for avoiding collisions, whether or not the radar or other plotting aid is in use.
Visual and audible alarm are generated when the predicted CPA and TCPA of any target become less than their preset limits. The au- dible alarm continues for 10 seconds.
The
When the predicted CPA of any target be- comes smaller than a preset CPA alarm range and its predicted TCPA less than a preset TCPA alarm limit, the
Provided that this feature is used correctly, it will help prevent the risk of collision by alert- ing you to threatening targets. It is important that GAIN, A/C SEA, A/C RAIN and other radar controls are properly adjusted and the Auto Plotter is set up so that it can track tar- gets effectively.