11
2) Heading alignment You have mounted the antenna unit facing
straight ahead in the direction of the bow .
Therefore, a small but conspic uous target dead
ahead visually should appear on the heading
mark (zero degrees).
In practice, you will probably observe some
small error on the display becaus e of the
difficulty in achieving accurate initial positioning
of the antenna unit. The following adjustm ent
will compensate for this error, up to ±30
degrees.
1. Identify a suitable target (for ex ample, ship
or buoy) at a range between 0.125 to 0.25
miles, preferably near the headi ng mark.
To minimize error, keep ec hoes in the
outer half of the picture by changing the
range.
2. Press and hold down and together
(about 10 seconds) to display the
installation menu.
SEL MENU
BY ▲
/
▼ KEY
TOTAL ON TIME
00000 : 00
TOTAL TX TIME
00000 : 00
ADJUST PICTURE ORIENTATION
USING KEYS SO THAT
HEADING MARK BISECTS TARGET
LOCATED DEAD AHEAD.
TUNE
Total hours radar
has been on Total hours radar
has been trans-
mitted
Tuning bar
(for technicians)
Instructions for item selected appear here.
(example: heading adjustment)
Menu
1. ADJ HDG
2. ADJ TMG
▲
▲
/
3. NM /KM
Figure 21 Installation menu
3. Select ADJ HDG. Your display should now
look something like the one shown in
Figure 22.
3. NM /KM
30° 30°
SEL MENU
BY ▲
/
▼ KEY TOTAL ON TIME
00000 : 00
TOTAL TX TIME
00000 : 00
ADJUST PICTURE ORIENTATION
USING KEYS SO THAT
HEADING MARK BISECTS TARGET
LOCATED DEAD AHEAD.
1. ADJ HDG
2. ADJ TMG TUNE
0.25
NM
.125
▲
▲
/
3. NM /KM
Figure 22 Display for adjustment of heading
4. Press or to bisect the target selected
at step 1 with the dot-dash-line.
5. Press MENU.
0.25
.125 NM
NM
9.4
0.015
Target
Heading
marker
Figure 23 How to adjust heading
6. As a final test, move the boat tow ards a
small buoy and confirm that the b uoy
shows up dead ahead on the radar when it
is visually dead ahead.