How To Align The Heading - Furuno FAR-1513 Installation Manual

3.4

How to Align the 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 following adjustment will compensate for this error.
Front of antenna
Target
a
Antenna mounted error
to port
(HDG SW advanced)
1. Select a stationary target echo at a range between 0.125 and 0.25 NM, preferably
near the heading line.
2. Press the EBL key to turn on the EBL. Rotate the Setting knob to pass the EBL
through the center of the target echo.
3. Read the target bearing.
4. Measure the bearing of the stationary target on the navigation chart and calculate
the difference between the actual bearing and apparent bearing on the radar
screen.
5. Open the [RADAR INSTALLATION] menu, then open the [ECHO ADJUST] menu.
[ECHO ADJUST]
1
2
3
4
5
6
7
6. Select [HD ALIGN], then enter the bearing difference measured at step 4. The set-
ting range is 0 to 359.9 degrees.
7. Confirm that the target echo is displayed at the correct bearing on the screen.
Correct bearing
(relative to heading)
000
350 010
020
340
330 030
320
040
310 050
060
300
290
280
270
Apparent Apparent
260
250 position of position of
240
120
target target
230
130
220 140
210 150
200 160
190
180 170
Picture appears
deviated clockwise.
BACK
VIDEO ADJ
MAN/AUTO
VIDEO ADJ VALUE
30
HD ALIGN
000.0°
TIMING ADJ
MAN/AUTO
TIMING ADJ VALUE
200
MBS LEVEL
0
a
Front of antenna
b
Target
070
080
090
100
110
Antenna mounted error
to starboard
(HDG SW delayed)
3. ADJUSTMENTS
Apparent position
b
of target
350 000 010
340 020
330 030
320
040
310 050
300 060
290 070
280 080
090
270
Correct bearing Correct bearing
260 100
250
110
(relative to (relative to
240
120
heading) heading)
230
130
220 140
210 150
200 160
190 170
180
Picture appears
deviated counterclockwise.
3-3