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Marine RADAR
Furuno
821, 841
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Contents
Main
PUB. No. OME-34160
A
FIRST EDITION :
UG. 1995 G : JAN. 11, 2001
i
TABLE OF CONTENTS
2. OPERATION
3. INTERPRETING THE DISPLAY
4. MAINTENANCE & TROUBLESHOOTING
5. INSTALLATION
FOREWORD
Features
SPECIFICATIONS MODEL 821
Antenna Unit
Transceiver Module (contained in radome)
Display Unit
SPECIFICATIONS MODEL 841
Antenna Unit
Transceiver Module (contained in radome)
Display Unit
Interface NMEA (MODEL 821/841)
Page
viii
CONFIGURATION OF MODEL 821/841
1. PRINCIPLE OF OPERATION
1.1 What is Radar?
1.2 How Ships Determined Position Before Radar
1.3 How Radar Determines Range
1.4 How Radar Determines Bearing
2
Figure 1-1 How radar works
3
2. OPERATION
Figure 2-1 Control panel
2.1 Control Description
4
2.2 Display Indications and Markers
}
308.7
0.646
220.9
0.675
2.4 Transmitting
2.5 Selecting the Range
2.6 Adjusting LCD Backlighting and Display Tone
2.7 Adjusting Control Panel Brilliance
2.8 Adjusting GAIN, STC, A/C RAIN and FTC
[ [
12
2.9 Tuning the Receiver
1.5
2.11 Measuring the Bearing
2.10 Measuring the Range
2.12 Menu Operation
. . . . . . . . . . . . . . . . .
10
Table 1-1 Menu description
* Default settings shown in boldface.
2.13 Selecting the Display Mode
2.14 The Window Display
2.15 Selecting the Presentation Mode
2.16 Guard Alarm
CAUTION
2.17 Suppressing Radar Interference
2.18 Suppressing Noise Interference
2.19 Selecting Pulselength
2.20 Off Centering the Display
2.21 Echo Trails
2.22 The Navigation Data Display
. . . . . . . . . . . . . . . . .
2.23 Echo Stretch (magnifying long range echoes)
2.24 Selecting Unit of Measurement for Range
2.25 Selecting Bearing Reference
2.26 Watchman
2.27 Erasing the Heading Marker
2.28 Deselecting Ranges
CAUTION
Page
3.2 Target Properties and Radar Wave Reflection
3. INTERPRETING THE DISPLAY
3.1 The Radar Wave and Radar Horizon
3.3 Range Resolution
3.4 Bearing Resolution
3.5 False Echoes
Page
3.6 Nautical Chart and Radar Picture
4. MAINTENANCE & TROUBLESHOOTING
4.1 Safety Information
4.2 Preventative Maintenance
4.3 Replacing the Fuse
4.4 Troubleshooting
4.5 Self Test
5. INSTALLATION
5.1 Antenna Unit Installation
NOTICE
Page
Page
Ship's bow
Page
Page
Page
5.2 Display Unit Installation
37
4 - 6 FIXING HOLES
Figure 5-13 How to mount the display unit
* :SERVICING CLEARANCE
10mm 222(8.7")
CAUTION
Page
5.3 Installation Check List
CAUTION
GAIN
5.4 Initial Adjustment of Picture
STC
[ [
12
5.5 Displaying the Installation Menus
. . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . .
5.6 Entering Initial Settings
5.7 Relative Bearing Alignment
. . . . . . . . . . . . . . . . .
5.8 Sweep Timing
5.9 Closing the Installation Menus
5.10 Signal cable connection