Heading Alignment - Furuno FAR2167DS-BB Installation Manual

3.2 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 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 adjust-
ment will compensate for this error.
Antenna mounted error
to port (HDG SW
advance)
Antenna mounted error
to starboard (HDG
SW delayed)
1. Select a stationary target echo at a range between 0.125 and 0.25 nm, preferably near the
heading line.
2. Operate the EBL control to bisect the target echo:
a) Roll the trackball to place the arrow in the EBL1 or EBL2 box (at bottom left corner), whichever
EBL you want to use.
b) Push the left button to turn on the EBL.
c) Push the left button again to send the cursor inside the effective display area.
d) Roll the trackball (coarse adjustment) or spin the thumbwheel (fine adjustment) to bisect the
target with the EBL.
3. Read the target bearing.
4. Measure the bearing of the stationary target on the navigation chart and calculate the difference
between actual bearing and apparent bearing on the radar screen.
5. Left-click the MENU box at the right side of the screen to close the menu.
3-2
Correct bearing
relative to heading
000
350
Target
340
330
320
310
300
290
280
270
260
250
240
230
220
210
200
190
180
Picture appears
deviated clockwise.
Apparent position
of target
Target 000
350
340
330
320
310
300
290
280
270
260
250
240
230
220
210
200
190
180
Picture appears
deviated counterclockwise.
Heading alignment
010
020
030
040
050
060
070
080
090
Apparent
100
position
110
120 of target
130
140
150
160
170
010
020
030
040
050
060
070
080
090
Correct
100
bearing
110
relative to
120
130
heading
140
150
160
170