Furuno FR1500 Mk3 User Manual Page 29
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- Table of contents
- TROUBLESHOOTING
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-1.17-
1.22 Setting a Target Alarm Zone
CAUTION
The target alarm feature should never be relied upon as the sole means for detecting the risk of
potential collision. The operator of a ship is not relieved of the responsibility to keep lookout for
avoiding collisions, whether or not the radar is in use.
1.22.1 Introduction
There are two independent Target Alarm Zones. NO. 1 zone has a default coverage of 3.5-4 nm
and is adjustable within 3.0 to 6.0 nm. NO. 2 zone may be adjusted anywhere when the NO. 1 TAZ
is valid. On the R-type, the outer and inner boundaries can be set at any distance. In any radar type,
the sector of the zones can be set anywhere between 0 and 360 degrees in any direction. When the
radar is equipped with Automatic Tracking Aid (ATA) or ARPA, a Guard Zone alarm is also
available.
To set target alarm zones:
1. Press the [MENU] key and press the [3] key twice to show the TGT ALARM menu.
TGT ALARM
1. AREA NO. NO 1 NO 2
2. MODE 1 IN OUT
3. MODE 2 IN OUT
In R-type, you can use NO. 1 as TAZ by selecting IN
and NO. 2 as an Anchor Watch by selecting OUT. In
IMO type, only IN is available.
2. Press the [1] key to select guard zone to use NO 1 or NO 2.
3. Press the [ENTER/SELECT] key.
4. Press the [MENU] key.
5. Place the cursor (+) at point “A” (see figure below) using the trackball. Press the [TGT
ALARM ] key. SET TA1(2) appears at the lower-right corner on the screen. When both
alarms are prepared the active alarm is circumscribed.
6. Move the cursor (+) to point “B” and press the [TGT ALARM] key again. Then, an echo
watch zone as illustrated is created and the label TA1 (or 2) appears instead of SET TA1 (or
2) at the lower-right corner of the screen.
000
030
060
090
120
150
180
210
240
270
300
330
010
020
040
050
070
080
100
110
130
140
160
170190
200
220
230
250
260
280
290
310
320
340
350
TAZ
B
A
Target alarm zone (TAZ) can be set in any sector
between 3 and 6 nm on IMO-type, and anywhere on
the R-type.
When the radar has the ATA board ARP-17, a total of
3 alarm zones (two TAZs and one GZ) may be set.
The 2nd TAZ is available only when the 1st TAZ is
valid.
- SHIPBORNE RADAR AND ARPA 1
- *00080840400**00080840400* 2
- *OME34500T00**OME34500T00* 2
- SAFETY INSTRUCTIONS 3
- TABLE OF CONTENTS 5
- INTRODUCTION 7
- •1 menu are not accessible 9
- ANTENNA RADIATORS 10
- RF TRANSCEIVER 10
- DISPLAY UNIT 10
- INTERFACE 10
- POWER SUPPLY 10
- 1 OPERATIONAL OVERVIEW 13
- Video Freeze-up Recovery 13
- 1.3 Control Description 14
- 1.4 CRT Brilliance 15
- 1.6 Tuning the Receiver 15
- 1.7 Degaussing the Screen 16
- 1.9.2 Manual speed input 17
- PULSE 1 M1 18
- H U RM 18
- 1.11 Presentation Modes 19
- 1.15 Suppressing Sea Clutter 23
- 1.17 Interference Rejector 24
- 1.18 Measuring the Range 25
- 1.19 Measuring Bearing 26
- 1.22.1 Introduction 29
- 1.23 Off-centering (shift) 30
- 1.24 Echo Averaging 31
- 1.25.1 Plotting a target 33
- 1.25.2 Cancelling 34
- 1.25.3 Vectors 34
- CPA/TCPA 35
- 1.25.8 Past plot points 36
- 1.26.2 Trail gradation 37
- 1.26.4 Thin trails 37
- 1.26.5 Restoring trails 38
- 1.27 Parallel Index Lines 39
- 1.30 Markers 41
- 1.32 [F1] Key 42
- 1.33 [F2] Key 43
- 1.34 FUNCTION Key 44
- -1.34 46
- 1.36.1 Echo stretch 47
- 1.36.2 Contrast 47
- 1.37 Watch Timer 48
- 1.38 Noise Rejector 49
- 1.39 Navigation Data 49
- 1.42 Degaussing Interval 50
- 1.43 Background Color 50
- 1.44 Clutter Sweep 50
- 1.45 Day, Night Brilliance 51
- 1.46 Contrast 51
- 1.47.1 Preparation 52
- 1.48 Alarms 56
- 1.51 Echo Area (R-type only) 59
- 2.1 Introduction 60
- 2.2 Criteria of Tracking 61
- Own ship maneuvers 62
- Other ship maneuvers 62
- 2.5 Acquiring Targets 65
- - TARGET SWAP 66
- 2.5.2 Automatic acquisition 66
- 2.6.1 Individual targets 67
- 2.6.2 All targets 67
- 2.7.1 Vector time 68
- 2.7.2 Vector start time 68
- 2.9 Past Position Display 69
- 2.10 Set and Drift 69
- 2.11 Alarms 70
- 2.11.3 Guard zone alarm 71
- 2.13 Outputting Target Data 72
- 2.14 Diagnostic Sequence 73
- Sea returns 74
- Indirect echoes 75
- 3 RADAR OBSERVATION 76
- Bearing accuracy 77
- Range measurement 77
- 3.2 False Echoes 78
- Screen A: When SART 79
- is distant 79
- Screen B: When SART 79
- is close 79
- 3.4 RACON (Radar Beacon) 81
- 5 MAINTENANCE 83
- 5.3 Replacement of Batteries 84
- 6 TROUBLESHOOTING 85
- Serviceman qualification 86
- Service call 86
- (Continued on next page) 87
- 6.3 Diagnostic Test 90
- 6.4 Menu Hierarchy 92
- [MENU] key + 93
- 7 OPTIONAL EQUIPMENT 95
- 9 nm 9 nm 96
- Description of Sentences 99
- * Not used 102
- *: Not used 103
- T = tracking 106
- Figure A-5 Scanner unit 110
- Figure A-6 RF module 111
- MD Board 112
- 9.2 Circuit diagrams 113
- CHANNEL 2 OUTPUT 114
- 9.3 Parts list 116
- 2 FR-1505/1515/1525 MARK-3 117
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