Furuno FAR-2827 - Manual (Page 55)

3. SETTING AND ADJUSTMENT
3-17
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. Open the INITIALIZE menu. See page 3-4.
2. Press the [3] key to show the SCANNER menu.
3. Select 9 [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".
4. Select 2 [DUAL RADAR] and push the left button.
5. Select OFF, MIX or COMBINE as appropriate and push the left button. For MIX and
COMBINE, the ANTENNA box at the top left-hand side becomes gray.
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:
Orange: An echo existing on both the main radar and the external radar.
Yellow: An echo only appearing on the main radar.
Yellow/Green: An echo only appearing on the external radar.