Table of Contents
Part 1 Getting Started
1 Starting up 2
The parts of a radar set 3
Getting a picture 5
Summary 10
2 Interpreting the picture 11
Radar horizon 12
Refraction 12
Radar beam 13
Pulse length 14
Radar shadow 15
The quality of different targets 16
3 Disturbing phenomena 22
Sea Clutter 22
Rain Clutter 23
Side Lobe contacts 24
Indirect contacts 24
Interference 26
Blind sectors 26
4 Display modes 27
Head-up 27
North-up 28
Course-up 28
Off centre 29
True motion 29
Radar overlay 30
Sources of technical error 31
Broadband radar 31
Part 2 Navigation
5 Navigating by radar 34
Identifying your position 35
Determining direction 36
Planning ahead 38
6 Pilotage 39
Controlling your track 42
Parallel indexing 44
Altering course 45
Clearing ranges 46
Stopping in time 46
Identifying objects 47
The human factor 49
Making landfall 50
Summary 51
Part 3 Collision avoidance in restricted visibility
7 Proceeding with caution 53
The importance of a look-out in restricted visibility 54
Finding a safe speed 55
8 Locating and monitoring moving targets 58
Guard Zones 58 Trail function 59
9 Assessing the risk of collision 60
Relative motion 60
Using the EBL 61
Using the Trail function 62
MARPA 63
Plotting 65
Radar assisted collision 66
The relative plot in practice 68
10 Taking avoiding action in the open sea 70
Altering course 70
Planning avoiding actions in advance 72
Avoiding actions in practice 75
11 Close-quarters situations 78
Avoiding action in restricted visibility and in confined waters 79
Follow-up 81
In visual contact 82
12 The human element 84
Wahkuna and P&O Nedlloyd Vespucci 85
Whispa and Gas Monarch 86
13 Seeing and being seen 89
Radar reflectors 89
Radar transponders 90
Glossary 92
