Furuno FR-8251 manual Electronic Plotting E-plot, Trail brilliance, Plotting a target, 23 Plotting

Trail brilliance

Trail brilliance may be adjusted on the BRILL menu.

1)Press the MENU key.

2)Select the BRILL menu.

3)Press the ENTER/SELECT key.

4)Select TRAIL and press the ENTER/SELECT key.

5)Operate the VRM or EBL control to adjust trail brilliance.

6)Press the ENTER/SELECT key.

7)Press the MENU key.

1.27 Electronic Plotting (E-plot)

10 operator-selected targets can be plotted elec- tronically to assess their motion trends. Five past positions are marked for each plotted target.

A vector appears as you enter a second plot for a target and is updated each time a new plot is en- tered for the target. The vector shows the target motion trend based on its latest two plots.

Alphanumeric readouts for last-plotted or selected target appear at the bottom of the display.

It should be noted that the vector and alphanu- meric target data are not updated in real time, but only when you enter a new plot.

E-plot requires ship's speed input (automatic or manual) and a compass signal.

When speed is input by a navigator, own ship moves in accordance with course; not heading.

Plotting a target

Before plotting a target, select PLOT or ALL on the MARK & DATA DSP menu.

1)Place the cursor on the target you want to plot, and press the PLOT SYMBOL key.

2)Watching the E-plot timer on the PLOT mode, wait at least 30 seconds. Place the cursor on the plot symbol and press the ENTER/SE- LECT key. The plot symbol of the target flashes.

3)While the plot symbol of the target is flash- ing, place the cursor on the target again and press the PLOT SYMBOL key. The plot sym- bol shifts to the new target position and the previous position is marked by a small dot.

	SPEED
HDG 123.4°
	MANUAL 30.0kt

0.25 NM

0.05	AUTO
	GUARD1
ZOOM
SP	GUARD2
HU	IN

Past

position (max. 5)

Vector		Plot
		symbol
A/C			NR
F3			IR2
L-ES			ES1
			EAV1
345.6°R	EBL	VRM	0.080nm
23.0°R			0.220nm

+105.0°R 00.74nm TTG 12:34

REL VECTOR	BRG	057.1°R	COURSE	231.0°R
12MIN	RNG	2.7nm	SPEED	7.5kt
TIME 01:28	CPA	0.4nm	TCPA	22.2

Plot data (for )

Figure 1-23 Plotting

Note: If a certain target once plotted is not plot- ted again within 12 minutes, the plot symbol of the target flashes. If you want to continue plot- ting this target, reacquire it within one minute, otherwise, the target will be regarded as a "lost target" and its plot symbol and target data will be erased. The larger the plotting interval, the less accurate the plotted target data. Plotting of each target should normally be made every 3 or 6 min- utes as far as possible.

1 – 20