Furuno 1715 Manuel D’Utilisation

1. OPERATION 

The guard alarm allows the operator to set 
the desired range and bearing for a guard 
zone. When ships, islands, landmasses, etc. 
violate the guard zone, audio and visual 
alarms are released to call your attention. 
The alarms will be released for targets 
entering or exiting the zone depending on the 
presence or absence of targets in the zone 
when the alarm is set.   

*

The alarm should not be relied upon as the
sole means for detecting possible collision
situations.

*

A/C SEA, A/C RAIN, FTC and GAIN controls

   should be properly adjusted to be sure the
   weak echoes will not be missed by the alarm.

1.  Operate the cursor pad to place the 

cursor at the top left corner for the zone 
and then press the [ALARM] key. 

2.  Operate the cursor pad to place the 

cursor at the bottom right corner for the 
zone and then press the [ALARM] key. 

Guard
zone
to set

      G(---)

1) Place cursor at

top left corner for
zone and press
[ALARM].

 

Place cursor
here.

Mentally create
the guard zone
to set.

2) Place cursor at

bottom right corner
for zone and press
[ALARM].

Guard zone
completed.

Guard

zone

Place cursor
here.

G(---)

    G(---)

After the guard zone has been set, the radar 
checks for targets inside the guard zone, 
which takes about 8 to 12 seconds. When the 
check is completed, “G(IN)” or “G(OUT)” 
replaces G(---) at the top right corner. 
 
G(IN): When no target exists in the zone, 
"G(IN)" appears. The audio alarm sounds 
against targets which enter the guard zone. 
G(OUT): If there are targets in the guard 
zone, "G(OUT)" appears. The audio alarm 
sounds against all targets which exit from the 
guard zone. 

(a) Inward target alarm

(b) Outward target alarm

Note: The guard zone disappears when it is 
not within the range in use. When this occurs 
"UP RNG" replaces G(IN) or G(OUT). 
Change the range to redisplay the guard 
zone. 
 

When a target violates the guard zone, the 
target flashes and the audio alarm sounds. 
You can silence the audio alarm with the 
[ALARM] key. The target continues flashing 
until the reason for the alarm ends or the 
guard zone is canceled. 
 

Press and hold down the [ALARM] key until 
the guard zone is erased.