Furuno FR1500 Mk3 User Manual download pdf (Page 33)

-1.21-

1.25 Electronic Plotting Aid (EPA)

10 targets can be plotted electronically to assess their motion trend. Five past positions can be

displayed for each target. Working range of EPA is 0-48 nm irrespective of range scale. Note that

EPA is disabled when the ATA (ARP-17) is accommodated.

Target data is shown in the data display area including range, bearing, course, speed, CPA and

TCPA of the last-plotted or selected target.

EPA SYMBOLS

○ Target plotted

□ Plotted target and the data being read

Flashing: Targets in Target Alarm Zone

△ Target on a collision course

Target 2 is on a collision course as the extension of its

vector goes through the own ship position. Placing the

offset EBL will help for assessment. TCPA is counted

up to 99.59 min and beyond that it is indicated as

TCPA > 99.99 min.

Note:

Plots will be lost when the compass or speed log fails.

1.25.1 Plotting a target

1. Place a cursor on a target of interest and press the

[PLOT SYMBOL] key. The target position changes

with a calculated speed and course every 1-2 seconds

by the auto follow-up feature, maintaining the

calculation origin at point (a). If option (7) TRACK is

ON, tracked positions are indicated by dots.

2. In more than 30 seconds but within 10 minutes, place the cursor on the latest calculated

position (b) and press the [ENTER/SELECT] key. The plot symbol changes from ○ to □. This

step is to identify the target on which you want the plotting data.

3. Place the cursor on the target within 5 seconds, maybe at a different location due to leeway at

(c), and press [PLOT SYMBOL] key. The vector will be drawn based on a trip between (a) and

(c). The target data is indicated in the text area to the right. Correction of plot position (c’), if

necessary, is possible within 5 seconds, to show the course made good and speed made good

(a-c’).

4. Do the same for other targets (maximum 10). For targets already in auto follow-up, do steps 2

and 3.

(b) Latest calculated

position

(a) First plot position

(c') Re-entry for correction

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RNG 4.7NM

BRG 41.5°T

CSE 198.0°T WT

SPD 10.3K WT

CPA 0.9NM

TCPA 15:20

MAN 00:01

3 TRUE VECT

3Min WT

TAZ

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Furuno FR1500 Mk3 User Manual Page 33

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