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