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5-2 E-Series Networked Display Reference Manual
What is the maximum range of my radar?
Maximum radar range is essentially line-of-sight, so is limited by the height of the
scanner and the height of the target as illustrated below:
The table below shows typical maximum radar ranges for various radar antenna
heights and target heights. Remember that although the radar horizon is greater than
the optical horizon, the radar can only detect targets if a large enough target is above
the radar horizon.
What factors can impair a radar picture?
Not all radar echoes are produced by valid targets. Spurious echoes may be caused by:
• Side lobes.
• Indirect echoes.
• Multiple echoes.
• Blind sectors.
• Sea, rain or snow clutter.
• Interference.
Through observation, practice, and experience, you can generally detect these
conditions very quickly and use the radar controls to minimize them.
Antenna height (m) Target height (m) Maximum range (nm)
337.7
3 10 10.9
538.9
5 10 12.0
a
1
a
2
Earth
h
H
Cliff
Radar
D1643-2
R
max
R
max
= 2.23 ( h + H )
R
max
h
H
maximum radar range
radar antenna height
target height
in nautical miles
in metres
in metres
R
max
= radar horizon of antenna (
a
1
) + radar horizon of target (
a
2
)
81244_1.book Page 2 Wednesday, December 1, 2004 11:41 AM
- E-Series 1
- Networked 1
- Reference Manual 1
- Contents 3
- Contents iii 5
- Contents v 7
- Contents vii 9
- Important Information 11
- EMC conformance 12
- Multi-media chart cards 12
- Chapter 1: Overview 13
- Fishfinder 14
- Course deviation indicator 15
- Digital Instruments 15
- Engine Monitor 15
- 1.3 The Simulator 16
- Chapter 2: General Operation 17
- 2.3 Using the controls 18
- Buttons and soft keys 19
- The cursor 20
- ACKNOWLEDGE 21
- Accessing menus 22
- Selecting a page set 25
- Cautions 27
- How do I insert a card? 28
- How do I remove a card? 28
- Saving information to a card 29
- Note: Pressing the 30
- 2.10Emergencies and warnings 33
- How do I cancel an alarm? 34
- 3.1 What is a waypoint? 35
- Available waypoint 36
- Default symbol 36
- Alternative 36
- ... at the cursor? 37
- ... at my current position? 37
- ... at a known position? 37
- ...using the cursor 38
- ...via the WPTS MOB button 38
- Stop navigating to a waypoint 39
- ...using the waypoint list 40
- Changing waypoint details 41
- Moving a waypoint 42
- Erasing a waypoint 42
- Default Symbol 43
- Default Group 43
- My Waypoints 43
- Making a new waypoint group 44
- Renaming an existing group 46
- Erasing a group 46
- Display by symbol or group 47
- Display waypoint names 47
- Chapter 4: Using the Chart 49
- 4.3 Viewing the chart 50
- 4.4 The chart display 51
- 4.5 Where am I on the chart? 51
- Zooming in/out 52
- D 6771-1 53
- Displaying details of tides 54
- Search for a port 56
- Port symbol 57
- To position the ruler 58
- To reposition the ruler 58
- To clear the ruler 58
- Go to the cursor position 59
- Go to a waypoint 60
- Building a route 61
- Building routes on screen 62
- BUILD NEW 63
- USE THIS 63
- WAYPOINT 63
- : 64
- Following a route 65
- Follow using Quick Route 66
- Follow using the cursor 66
- Follow using the route list 66
- Follow in reverse order 67
- Viewing details of routes 68
- ... using chart vectors 69
- Wind and tide arrows 70
- CHART MODE AND 71
- ORIENTATION… 71
- RDR RNG SYNC 71
- ON OFF 71
- PRESENTATION… 71
- Chapter 5:Using the 72
- Chapter 5: Using the Radar 73
- What is a track? 74
- How can I use tracks? 74
- Creating a track 74
- Creating a route from a track 75
- ...from a saved track? 76
- To select a route 77
- To select a track 77
- Reversing a route 78
- ‘ 79
- PLACE WAYPOINT 80
- Using cross track error (XTE) 81
- , the route is 82
- Quick Route 82
- Erasing a route or track 83
- Local chart view 84
- System chart view 84
- North Up (N-up) 84
- True motion (TM) 86
- Autorange 87
- ... by group/symbol 87
- ... waypoint name 88
- Chart Setup 90
- Chart Offset 91
- Chart offset indicator 91
- Cartography set up 92
- Chapter 5:Using the Radar 95
- True echo Side echoes 97
- Main lobe 97
- Side lobe Side lobe 97
- Multiple echoes 98
- Blind sectors 98
- Sea clutter 98
- Rain clutter 99
- Interference 99
- (Rotating icon) 100
- (static icon) 100
- (greyed-out icon) 100
- (rotating/static icon) 100
- 101
- Head Up (H-UP) 102
- Setting the motion mode 103
- True Motion (TM) 104
- Using the GAIN functions 105
- Interference Rejection 108
- Expansion 108
- ... Using the range rings 109
- ... Using the cursor 110
- ... Using VRMs and EBLs 110
- ... Using floating VRMs/EBLs 111
- Guard Zones 112
- Sector guard zone 113
- 6nm Head-Up Relative Motion 113
- Rings 1nm 113
- Circular guard zone 114
- SAFETY NOTICES 115
- Introduction to MARPA 115
- How is a risk assessed? 116
- What happens to target data? 116
- Dangerous target 117
- Safe target 117
- Target being acquired 117
- Lost target 117
- Setting up MARPA 118
- How do I cancel targets? 119
- 5.11How do I set up my radar? 120
- 6.1 Introduction 123
- 200 kHz: Auto 124
- Gain: Auto High 124
- How are targets displayed? 125
- How do I see a live image? 127
- Changing the range 128
- Shifting the image 128
- Zooming in on the bottom 129
- Simplifying the bottom image 130
- Isolating bottom fish 132
- Adjusting the scroll speed 133
- Pausing the scrolling image 133
- Removing the depth digit 134
- TRANSDUCER 135
- SETTINGS… 135
- Using VRMs 137
- Transducer Calibration 139
- DSM Setup 140
- Controlling the image 141
- Operating frequency modes 142
- Gain modes 144
- Manual Gain Mode 145
- Color Gain 145
- TVG (Time Varied Gain) 145
- Gain adjust (200/50) 145
- Adjusting the power setting 146
- Indicator 147
- Instruction Cause 148
- 8.1 Introduction 149
- 9.1 Introduction 151
- Chapter 10:Video 153
- How do I run the video cycle? 155
- How do I adjust the image? 156
- Rename a page set 158
- System Setup 161
- Date/Time Setup Menu 162
- System Integration Setup Menu 163
- Alarm Setup Menu 164
- Navigation Alarms Setup 165
- Radar Alarms Setup 165
- Fishfinder Alarms Setup 165
- Fish Alarm Depth LImit 166
- Shallow Depth Alarm 166
- Deep Depth Alarm 166
- GPS Status 167
- Compass Setup 167
- Display Setup 168
- Databar Setup 168
- Select Page Set 168
- System Diagnostics 168
- Remove CF Card 168
- 12.1Introduction 169
- 12.3How do I reset a Display? 170
- Settings and data reset 171
- Help us to help you 172
- World wide web 172
- E120 Displays 175
- Chartplotter Features 178
- Digital data 179
- Engine monitor 179
- Interfacing 180
- 4-42, 4-43 186
- 4-38, 5-10 197
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