Furuno fmd-811 User Manual

3) Select Alarm Mode to IN or OUT.

4) Press the [ENT] key followed by the

[MENU] key.

Dashed line:
no alarm

IN ALARM                               OUT ALARM

Guard
zone

1) Mentally create the guard zone you want

to display. See Figure 1-13 (1).

2) Operate the cursor pad to set cursor on

top (bottom) left edge of the guard zone.
Press the [GUARD] key. *G (IN) (or G
OUT)), with asterisk blinking, appears at
the top right-hand corner on the display.
(The asterisk indicates the guard zone is
partially set.) See Figure 1-13 (2).

3) Operate the cursor pad to set cursor on

bottom (top) right edge of the guard zone
and press the [GUARD] key. The aster-
isk disappears. See Figure 1-13 (3).

4) Guard zone appears on the display. See

Figure 1-13 (4).

Any ships, landmasses, etc. coming into (or
going out of) the guard zone will trigger the
audible alarm and display the guard zone in
reverse video. You can silence the alarm by
pressing the [GUARD] key. When this is
done, G (ACKN) replaces G (IN) (or G
(OUT)).

Press the [GUARD] key again to reactivate
the alarm. G (IN) (or G (OUT)) replaces G
(ACKN).

Press and hold down the [GUARD] key until
the guard zone disappears.

• When the radar range is less than one half

of the guard zone range, the guard zone
disappears from the display and UP
RANGE appears. If this happens, raise
the range to redisplay the guard zone.

• A target echo does not always mean a

landmass, reef, ships or surface objects
but can imply returns from sea surface or
precipitation. As the level of these returns
varies with environment, the operator
should properly adjust the STC, gain (sen-
sitivity), A/C RAIN and A/C AUTO to
be sure the alarm system does not over-
look target echoes.

Guard zone
to set

* G (IN)

(2) Drag cursor to
top left corner of
zone and press
[GUARD]. 

Asterisk blinking

Drag cursor
here.

(1) Mentally create
the guard zone to set.

G (IN)

(3) Drag cursor to
bottom right corner
of zone and press
[GUARD].

(4) Guard zone
completed.

G (IN)

Guard
zone

Drag cursor
here.