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841
User Manual
Furuno 841 User Manual Page 13
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Table of contents
TROUBLESHOOTING
BOOKMARKS
Rated
.
/ 5. Based on
customer reviews
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2
A
B
C
D
Own ship
(radar)
D
A
B
C
Heading marker
Targets
Own ship
in center
Range and bearing
of a target, relative
to own ship, are
readable on the PPI.
(A) Bird's eye view of situation
(B) Radar picture of (A)
Figur
e 1-1 How radar works
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64
MARINE RADAR
1
Printed in Japan
2
SAFETY INFORMATION
3
TABLE OF CONTENTS
4
FOREWORD
5
SPECIFICATIONS–
6
MODEL 821
6
MODEL 841
7
Display Unit
8
Interface NMEA
9
(MODEL 821/841)
9
CONFIGURATION OF
11
MODEL 821/841
11
1. PRINCIPLE OF
12
OPERATION
12
Figure 1-1 How radar works
13
2. OPERATION
14
2.3 Turning the Radar On and
15
19 7
16
2.8 Adjusting GAIN, STC, A/C
17
RAIN and FTC
17
1.5
18
2.11 Measuring the Bearing
19
2.10 Measuring the Range
19
2.12 Menu Operation
20
Table 1-1 Menu description
21
2.13 Selecting the Display
22
2.14 The Window Display
23
2.16 Guard Alarm
24
2.17 Suppressing Radar
25
Interference
25
2.18 Suppressing Noise
26
2.19 Selecting Pulselength
26
2.21 Echo Trails
27
2.22 The Navigation Data
27
2.23 Echo Stretch (magnifying
28
2.24 Selecting Unit of
29
Measurement for Range
29
2.25 Selecting Bearing
29
Reference
29
2.26 Watchman
29
2.27 Erasing the Heading
30
2.28 Deselecting Ranges
30
2.29 Displaying Navigation
30
Data During Stand-by
30
3. INTERPRETING
32
THE DISPLAY
32
3.3 Range Resolution
33
3.4 Bearing Resolution
33
3.5 False Echoes
33
Indirect echoes
34
Side-lobe echoes
34
3.6 Nautical Chart and Radar
35
4. MAINTENANCE &
36
TROUBLESHOOTING
36
4.2 Preventative Maintenance
37
4.3 Replacing the Fuse
37
4.4 Troubleshooting
38
4.5 Self Test
39
5. INSTALLATION
40
Ship's
43
5.2 Display Unit Installation
47
236(9.3")
48
Connections
49
Navigation aid, video sounder
50
Heading Sensor Connection
50
5.3 Installation Check List
51
Procedure
52
5.6 Entering Initial Settings
53
5.8 Sweep Timing
54
5.9 Closing the Installation
54
5.10 Signal cable connection
55
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