Furuno BB FAR28x7 User Manual

Page 120

1. RADAR OPERATION

1-94

Note 2: In

the

dual radar display, a guard zone set on the main radar is also

accommodated on the external radar. When the position of the antennas
for the main and external radars is different and the No. 2 guard zone is set
on a close-in range, the on-screen guard zone may be shifted slightly from
both the main radar antenna reference and external radar antenna
reference. Accordingly, on the dual radar display, the actual guard zone
area may be shifted slightly. For example, the guard alarm sounds against
a target which has almost entered the guard zone. The further the range
the smaller the shift; however, there is little shift with the No.1 guard zone
(3-6 mile range, fixed). Further, do not set a guard zone such that it
straddles a boundary line of the dual radar sector.

A g

uard zone cannot be set while the dual radar display is active. Set a zone

before activa

ting the dual radar display.

1. Right-click the MENU box.

2. Select 9 [CUSTOMIZE, TEST] and push the left button.
3. Select 7 [OPERATION] and push the left button.
4. Select 9 [DUAL RADAR] and push the left button.
5. Select 2 DUAL RADAR and push the left button.

1 BACK
2 DUAL RADAR

OFF/MIX/COMBINE

3 COMBINE MODE*

OWN/EXT

4 COMBINE SECTOR*

START 000°
ANGLE 000°

5 COMBINE RANGE*

START

00.00NM

LENGTH 00.00NM

6 EXT RADAR

1/2/3/4

[DUAL

RADAR]

* Shown when 2 DUAL RADAR
is set for other than "MIX".

6. Select OFF, MIX or COMBINE as appropriate and push the left button.

OFF:

Turn off the dual radar display.

MIX:

Overlay whole external radar image on main radar image.

COMBINE: Display a part of the external radar image in the window on the

main radar.

Note: For the MIX display, the echo colors are as follows, regardless of

echo color settings:
Orang

An echo existing on both the main radar and the
external radar.

Yellow:

An echo only appearing on the main radar.

Yellow/G

reen: An echo only appearing on the external radar.