Furuno FR-1500 MARK-3, User Manual

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-1.17-
1.22 Setting a Target Alarm Zone
CAUTION
The target alarm feature should never be relied upon as the sole means for detecting the risk of
potential collision. The operator of a ship is not relieved of the responsibility to keep lookout for
avoiding collisions, whether or not the radar is in use.
1.22.1 Introduction
There are two independent Target Alarm Zones. NO. 1 zone has a default coverage of 3.5-4 nm
and is adjustable within 3.0 to 6.0 nm. NO. 2 zone may be adjusted anywhere when the NO. 1 TAZ
is valid. On the R-type, the outer and inner boundaries can be set at any distance. In any radar
type, the sector of the zones can be set anywhere between 0 and 360 degrees in any direction.
When the radar is equipped with Automatic Tracking Aid (ATA) or ARPA, a Guard Zone alarm is
also available.
To set target alarm zones:
1. Press the [MENU] key and press the [3] key twice to show the TGT ALARM menu.
TGT ALARM
1. AREA NO. NO 1 NO 2
2. MODE 1 IN OUT
3. MODE 2 IN OUT
In R-type, you can use NO. 1 as TAZ by selecting
IN
and NO. 2 as an Anchor Watch by selecting
OUT
. In
IMO type, only IN is available.
2. Press the [1] key to select guard zone to use NO 1 or NO 2.
3. Press the [ENTER/SELECT] key.
4. Press the [MENU] key.
5. Place the cursor (+) at point “A” (see figure below) using the trackball. Press the [TGT
ALARM ] key. SET TA1(2) appears at the lower-right corner on the screen. When both
alarms are prepared the active alarm is circumscribed.
6. Move the cursor (+) to point “B” and press the [TGT ALARM] key again. Then, an echo
watch zone as illustrated is created and the label TA1 (or 2) appears instead of SET TA1
(or 2) at the lower-right corner of the screen.
000
030
060
090
120
150
180
210
240
270
300
330
010
020
040
050
070
080
100
110
130
140
160
170 190
200
220
230
250
260
280
290
310
320
340
350
TAZ
B
A
Target alarm zone (TAZ) can be set in any sector
between 3 and 6 nm on IMO-type, and anywhere on
the R-type.
When the radar has the ATA board ARP-17, a total of
3 alarm zones (two TAZs and one GZ) may be set.
The 2nd TAZ is available only when the 1st TAZ is
valid.