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GP241 Edition :

GP241 Edition :

4th 2018 ECDIS Passage Planning and Watchkeeping

Description

ECDIS Passage Planning and Watchkeeping, 4th Edition 2018

ECDIS can contribute significantly to navigational safety and efficiency, however, this depends as much on the capability of the ECDIS operator. This publication shows how to produce a safe passage plan and safely use ECDIS when conducting a navigational watch.

This edition has been updated to reflect the latest IHO S52 Performance Library 4.0 which came in to effect in Sep 2017 with advice on the significant operational impact of PL 4.0.

2018, sees the final tranche of vessels that are required to be fitted with ECDIS and completes a 6 year implementation period to move the worlds merchant fleet to ECDIS. This update fully recognises that ECDIS is the primary source of navigation onboard and brings together experience from ship’s officers’ and Masters in how ECDIS is most effectively used onboard.

Fully revised and updated to provide practical guidance on passage planning and conducting the navigational watch using ECDIS.

Introduction 3

ECDIS Requirements 4

Effective Planning on ECDIS 4

The Four Stages of Planning 5

1 Appraisal/Information Gathering 7

Introduction 7

1.1 Appraisal Research 7

1.1.1 Destination 7

1.1.2 Climate 10

1.1.3 ENC Management 11

1.1.4 Other Considerations 15

2 Configuration of ECDIS Settings 17

2.1 Configuration of ECDIS Sensors 18

2.1.1 Antenna, Offsets and Ship Data 18

2.1.2 Checks and Settings 18

2.2 Understanding Safety Settings 21

2.2.1 Safety Depth and Safety Contour 21

2.2.2 Detection Area 25

2.2.3 Navigational Hazards 27

2.2.4 Isolated Dangers 28

2.2.5 Areas for which Special Conditions Exist 29

2.3 Display Parameters 30

2.3.1 Checks to Software and Chart Subscriptions in the Event of a Delayed Departure 30

2.3.2 System Units 30

2.3.3 ENC Loading Options 31

2.3.4 Display Category 31

2.3.5 Palette 33

2.4 Vessel Display Parameters 34

2.5 Route Display Parameters 34

2.5.1 Route Alarms 35

2.5.2 Other Display Options 35

3 Planning the Voyage 37

Introduction 37

3.1 Display Configuration 37

3.2 Route Creation 41

3.2.1 New Route 41

3.2.2 Adding Waypoints 44

3.2.3 Adjusting Waypoints 46

3.2.4 Multiple Route Options 53

3.2.5 Route Table 53

3.3 Supplementary Information 56iv

 

3.4 Manual Updates 60

3.5 Route Check 61

3.5.1 Configuration 61

3.5.2 Conducting the Route Check 64

3.5.3 Visual Check 65

3.6 Detailed Briefing 66

4 Execution (Executing the final voyage plan) 67

4.1 Route Data 67

4.2 Pick Reports 68

4.3 Chart Legend 70

4.4 Environmental Data 70

4.5 Mariner-added Objects 72

4.6 Symbols 73

4.7 Raster Chart Display System (RCDS) Mode 74

4.8 Course Alterations 74

5 Monitoring (progress along the pre-planned track) 75

5.1 ECDIS Handover 75

5.2 Position Monitoring 75

5.2.1 Cross-Checking Frequency 78

5.3 Managing the ETA 79

5.4 Radar and AIS Overlay 80

5.4.1 Radar Information 80

5.4.2 RIO and ENC Alignment 83

5.4.3 AIS Information 83

5.4.4 AIS Aids to Navigation 88

5.5 Anchor Watch Monitoring 90

5.5.1 Effective Planning 90

5.6 Deviation 93

5.7 ECDIS Additional Functionality 94

5.7.1 SAR Patterns 94

5.7.1.1 SAR Route Planning 95

5.7.2 Man Over Board (MOB) 98

5.8 Logbook 99

5.9 Sensor Failure 100

5.9.1 Gyro and Log Failure 100

5.9.2 GNSS Failure 100

5.10 ECDIS Failure 103

5.11 Monitoring Considerations 104

6 Effective Management of ECDIS 105

6.1 Use of ECDIS 105

6.2 Planning Errors 105

6.2.1 Unofficial Chart Data 105

6.2.2 Chart Installation 105

6.2.3 RCDS Mode 106

6.2.4 ENC Updates 108

6.2.5 Chart Subscription Expiry 108

6.2.6 Safety Contour 109

6.2.7 Isolated Dangers 111

6.2.8 Datums 112

6.2.9 Automatic Route Check 113v

 

6.3 Execution and Monitoring Errors 117

6.3.1 Configuration Errors 117

6.4 Misinterpretation of Data 126

6.4.1 Chart Symbols 126

6.4.2 Pick Reports 134

6.5 Planning while Monitoring on ECDIS 137

6.6 Cross-Checking the GNSS Position 138

6.7 Indication of Sensor Failure 139

6.8 GNSS Failure 140

6.9 ECDIS Voyage Recording 141

6.10 ECDIS Failure 142

6.10.1 Software and Hardware Failure 142

6.10.2 Cyber Security 143

6.11 Checking Performance 145

7 Hydrography 149

7.1 ENC Characteristics 149

7.1.1 Differences in ENC Quality 149

7.1.2 CATZOCs 150

7.1.3 Accuracy 151

7.1.4 Horizontal Datum 151

7.1.5 AIO and Temporary and Preliminary Notices to Mariners (T&P NMs) 153

7.2 ENC Coverage 155

7.3 ECDIS Mindset and Avoiding Over-Reliance 157

7.4 Overlapping Data 158

7.4.1 ENC scaling and display 159

7.4.2 Zoom, Scale and SCAMIN 162

7.4.3 Gaps in Data 165

7.4.4 ENC Text 166

7.4.5 National Language 168

ANNEXES

Annex A ECDIS Pre-sailing Configuration Checklists 171

Annex B Detection of Areas for which Special Conditions Exist 175

Annex C Additional Areas 179

Annex D Independent Mariner Selectors 185

Annex E Abbreviations 199

Annex F S-63 Error Codes and Explanations 203

Annex G Objects Associated with the Question Mark Symbol 207

Annex H MSC.1/Circ.1503/Rev.1, 16 June 2017 209

References 231

Index 233

Contents

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