Target Alarm; How To Set A Target Alarm - Furuno FAR-2228-BB Operator's Manual

1.39

Target Alarm

The target alarm serves to alert the navigator to targets (ships, landmasses, etc.) en-
tering a specific area, with audiovisual alerts.
The operator can set the alarm zones at
any location, with any size, however, the
zones must be inside the operational
display area.
Note: The target alarm boxes are not
displayed when the setting for [AZ/ALR
SELECT] in the [TT•AIS] menu is set to
the default setting [AQUISITION
ZONE]. To enable this function, set [AZ/
ALR SELECT] in the [TT•AIS] menu to [TARGET ALARM ZONE].
1.39.1

How to set a target alarm

The procedure below shows how to set a target alarm using the figure below as an
example. The alarm boxes are labeled [1:] and [2:], and are located at the bottom-right
of the screen, near the VRM boxes.
1. Select the appropriate alarm box, then left-click. The cursor jumps into the opera-
tional display area and the indication "SET" appears inside the target alarm box
selected.
Click the Alarm Zone
you want to set.
2. Using the trackball, move the cursor to Point A, then left-click.
3. Using the trackball, move the cursor to Point B, then left-click.
The indication "SET" is replaced with "WORK" in the box. The target alarm zone's
lines are shown as dashed lines.
320
310
300
280 290
270
260
250
240
230
220
210
Note 1: To create a 360° alarm zone, set Point B at the same location as Point A.
Note 2: Two alarm zones can be set simultaneously. The second alarm zone is only
available when the first alarm zone is active, however.
Note 3: When the target alarm zone is not within the range in use the indication "UP
RNG" appears to the right of the target alarm box. In this case select a range that will
display the target alarm zone.
TGT ALR
TT / AIS
1:
2:
000
350 010
340 020
330 030
040
Target
050
060 alarm
A
B
070
zone
080
090
100
110
120
130
140
150
200
160
190 170
180
1. OPERATIONAL OVERVIEW
CAUTION CAUTION
The alarm should not be relied upon as the
sole means for detecting possible collision
situations.
A/C SEA, A/C RAIN and GAIN controls
should be properly adjusted to be sure the
alarm system does not overlook target
echoes.
TGT ALR
TT / AIS
The indication
1:SET
changes to "SET".
2:
Other alarm zone examples
Point B
X
X
Point A
Point A
X
X
Point B
1-71