How To Align The Heading; Tuning Initialization - Furuno FAR-2218 Installation Manual

Tuning initialization

Tuning initialization is required before setting up the radar.
Open the main menu then select [ECHO]
[TUNING INITIALIZE] to start initialization.
"TUNE INIT" appears on the top of the dis-
play during the initialization.
After tuning is completed, right-click twice to
close the menu.
Note 1: In STBY, this menu is not available.
Note 2: For solid-state device radar, this
menu is invalid.
3.2

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 must appear on the
heading line (zero degrees).
Front of antenna
Target
a
Antenna mounted error
to port
(HDG SW advanced)
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 this error.
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.
3. Read the target bearing.
4. Measure the bearing of the stationary target on a navigation chart and calculate
the difference between the actual bearing and apparent bearing on the radar
screen.
5. Show the [RADAR INSTALLATION] menu.
6. Select [ECHO ADJUSTMENT] followed by [HD ALIGN].
7. Key in the bearing difference. The setting range is 0° to 359.9° (default: 000.0°).
8. Confirm that the target echo is displayed at the correct bearing on the screen.
Correct bearing
a
(relative to heading)
000
350 010
020
340
330 030
320
040
310 050
060
300
290 070
280 080
270 090
Apparent Apparent
260
100
250 position of position of
110
240
120
target target
230
130
220 140
210 150
200 160
190 180 170
Picture appears
deviated clockwise.
[TUNE] button [TUNE] button [TUNE] button
[TUNE MAN]: Manual tuning [TUNE MAN]: Manual tuning [TUNE MAN]: Manual tuning
[TUNE AUTO]: Auto tuning [TUNE AUTO]: Auto tuning [TUNE AUTO]: Auto tuning
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)
3. ADJUSTMENTS
Tuning bar
b
of target
000 010
350
340 020
330 030
040
050
060
070
080
090
Correct bearing Correct bearing
100
110
(relative to (relative to
120
heading) heading)
130
140
210 150
200
160
190 170
180
3-3