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2. Press the [ENTER] key to confirm your selection.
3. Press the [PLOT MENU] key to close the menu. The vector tip shows an estimated
position of the target after the selected vector time elapses. It can be valuable to ex-
tend the vector length to evaluate the risk of collision with any target.
1.25.4 Target data
The radar calculates motion trends (range, bearing, course, speed, CPA and TCPA) of all
plotted targets.
In the head-up and head-up true bearing modes, target bearing, course and speed shown
in the upper-right target data field become true (T) relative to north or relative (R) relative
to own ship in accordance with true/relative vector setting. In the north-up, course-up, and
True Motion modes, the target data field always displays true bearing, true course, and
speed over the ground.
Reading the target data
Press the [ACQ] key and corresponding numeric key, and the following target data is
displayed.
RNG/BRG (Range/Bearing): Range and bearing from own ship to last-plotted target with
suffix “T” (True) or “R” (Relative) plot symbol.
CSE/SPD (Course/Speed): Course and speed are displayed for the last-plotted target
with the suffix “T” (True) or ”R” (Relative) plot symbol.
CPA/TCPA: CPA (Closest Point of Approach) is the closest range a target will approach to
own ship. TCPA is the Time to CPA. Both CPA and TCPA are automatically calculated.
TCPA is counted up to 99.9 minutes and beyond this it is indicated as TCPA > *99.9 MIN.
BCR/BCT: BCR (Bow Cross Range) is the range at which a target will cross own ship’s
bow. BCT (Bow Cross Time) is the estimated time at which a target will cross own ship’s
bow. If BCR is negative, BCR/BCT readout is displayed as *.*.
1.25.5 Terminating target plotting
With EPA you can plot up to 10 targets. You may wish to terminate plotting of less impor-
tant targets to newly plot other threatening targets.
By Symbol: To terminate plotting of a certain target, press the [TARGET CANCEL] key
and then press the corresponding plot number key.
With Trackball: Use the trackball to place the cursor (+) on a target which you do not want
to be tracked any longer, and then press the [TARGET CANCEL] key.
All Targets: To terminate plotting of all targets at once, press and hold the [TARGET
CANCEL] key until all plot symbols and marks disappear (in about three seconds).