Target Data - Furuno FR-1710 Operator's Manual

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
15M 30M
5. CPA SET OFF
2NM
5NM
6. TCPA SET 30S
4M
7. TRACK OFF
8. AUDIO ALARM OFF
9. INTVAL* 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.
1-20
1M 3M 6M
0.5NM 1NM 1.5NM
3NM 4NM
6NM
1M 2M 3M
5M 6M 12M 15M
ON
ON
1M 2M 3M 6M

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.