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How to align the antenna heading
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 line (zero degrees).
In practice, you will probably observe some small bearing error on the display because
of the difficulty in achieving accurate initial positioning of the antenna unit. The follow-
ing adjustment will compensate for the error.
Correct bearing
(relative to heading)
Front of antenna
Target
a
310
300
290
280
270
260
250
240
230
Antenna mounted error
to port
(HDG SW advanced)
1. Set your radar with 0.125 and 0.25 nm range and the head up mode.
You can select a range by using the pinch action. The range appears at the bottom
right of the screen. Range may also be selected using the slide bar displayed on
the right-hand side of the radar display area. Drag the bar up to zoom in, or down
to zoom out.
Zoom in
Zoom in
2. Turn the vessel's bow toward a target.
3. Tap the [Home] icon to show the home screen and display mode settings.
4. Tap [Radar] to show the [Radar] menu.
5. Tap [Antenna Heading Align].
6. Key in an offset value (setting range: -179.9° to +180°) that puts the target at the
very top of the screen, then tap the
+: rotate echo in clockwise direction
-: rotate echo in counterclockwise direction
7. Confirm that the target echo is displayed at correct bearing on the screen.
a
000
010
350
340
020
330
030
320
040
050
060
070
080
090
Apparent
Apparent
100
position of
position of
110
120
target
target
130
140
220
210
150
200
160
190
170
180
Picture appears
deviated clockwise.
3. HOW TO SET UP THE EQUIPMENT
Apparent position
Front of antenna
b
Target
320
310
300
290
280
270
260
250
240
230
220
Antenna mounted error
Picture appears
to starboard
deviated counterclockwise.
(HDG SW delayed)
Zoom out
Zoom out
icon.
of target
b
000
350
010
020
340
330
030
040
050
060
070
080
090
Correct bearing
Correct bearing
100
(relative to
(relative to
110
120
heading)
heading)
130
140
210
150
200
160
190
180
170
Range
Radar indications
3-15
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