Furuno FR-2125V - Manual (Page 34)

1-23
1.21 Setting a Target Alarm Zone
CAUTION
The target alarm should not be relied
upon as the sole means for detecting
possible collision situations. The opera-
tor of a ship is not relieved of the re-
sponsibility to keep lookout for possible
collisions, whether or not the radar is
in use.
CAUTION
The target alarm is given to targets
having a certain level of echo strength.
This level does not always imply a land-
mass, reef, ships or other surface
objects but can mean returns from the
sea surface or precipitation. Properly
adjust the [GAIN], [A/C SEA], and
[A/C RAIN] controls to reduce noise to
avoid generation of an alarm against a
false target.
The target alarm serves to alert the navigator to targets (ships, landmasses, etc.) entering
a certain area with visual and audible alarms.
The outer and inner boundaries can be set at any distance. The sector of the zone can be
set anywhere between 0 and 360 degrees in any direction.
1.21.1 Setting a target alarm zone
1. Referring to Figure 1-24, use the trackball to place the cursor (+) at point “A”.
2. Press the [RADAR MENU] key to show the FUNCTIONS 1 menu.
3. Press the [2] key to set start point (point “A”) of the alarm zone. The message TGT
ALARM1 (or 2) SET appears at the bottom-right corner of the screen.
4. Move the cursor (+) to point “B” and press the [2] key again. Then, the target alarm
zone as illustrated is created and the label TGT ALARM1 (or 2) appears instead of TGT
ALARM1 (or 2) SET at the lower-right corner of the screen.
Note 1: If you wish to create a target alarm zone having a 360-degree coverage around
own ship, set point “B” in almost the same direction (approx.
±
3) as point “A” and press
the [2] key.
Note 2: If you change the range scale to less than half of the TAZ, the warning TGT
ALARM1 (or 2) OUT appears instead of TGT ALARM1 (or 2).
5. Two alarm zones can be set as described above. Press [ENTER] and [2] keys in that
order while displaying the FUNCTIONS 1 menu and repeat the above steps.