Furuno FR-1710 True or relative vector, vector time, Target data, Terminating target plotting

True or relative vector, vector time

Vectors can be displayed relative to own ship’s heading (Relative) or with reference to the North (True). This feature is available in all presentation modes (compass must be working correctly). The current vector mode is indicated at the upper-right corner of the screen.

Vector time (or the length of vectors) can be set to 30 seconds, 1, 3, 6, 15 or 30 minutes and the selected vector time is indicated at the upper-right corner of the screen.

1.Press the [MENU] key followed by the [7] key twice to select PLOT.

		PLOT MENU 1
1.	MARK DISP		OFF	ON
2.	ERASE
3.	VEC REF		REL	TRUE
4.	VEC TIME		30S	1M	3M	6M
			15M	30M
5.	CPA SET		OFF	0.5NM 1NM 1.5NM
			2NM	3NM	4NM
			5NM	6NM
6.	TCPA SET		30S	1M	2M	3M
			4M	5M	6M	12M	15M
7.	TRACK		OFF	ON
8.	AUDIO ALARM		OFF	ON
9.	INTVAL*			1M	2M	3M	6M
			30S
0.	↓ *

* Requires ATA Board ARP-17.

Figure 1-26 PLOT menu

2.Press the [3] key to select REL or TRUE from the VECT REF field as appropriate, and then press the [ENTER/SELECT] key.

3.Press the [4] to select appropriate vector time from the VEC TIME field, and then press the [ENTER/SELECT] key.

4.Press the [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 extend the vec- tor length to evaluate the risk of collision with any target.

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 be- come true (T) relative to north. The target data field always displays true bearing, true course and speed over the ground.

Reading the target data

Place the cursor on a plotted target and press the [ENTER/SELECT] key. Then, the follow- ing target data is displayed at the right side of the CRT.

RNG/BRG (Range/Bearing): Range and bearing from own ship to last-plotted target with suffix “T” (True).

CSE/SPD (Course/Speed): Course and speed are displayed for the last-plotted tar- get with suffix “T” (True).

CPA/TCPA: CPA (Closest Point of Approach) is the closest range the target will approach to own ship. TCPA is the time to CPA. Both CPA and TCPA are automatically calculated. TCPA is counted up to 99.59 min and be- yond that it is indicated as TCPA > *99.59 MIN.

Terminating target plotting

With the EPA you can plot up to 10 targets. You may wish to terminate plotting of less important targets to newly plot other threat- ening targets.

With Trackball: Place the cursor (+) on a target which you do not want to be tracked any longer by operating the trackball and press the [CANCEL/CLEAR] key.

All Targets: To terminate plotting of all tar- gets at once:

1.Press the [MENU] key followed by the [7] key twice.

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