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• Foreword 2Introduction 51 Who, Where, When? 62 Assessing the Risk 103 Narrow Channels and Separation Schemes 194 Who Gives Way? 265 Fog! 416 Lights and Shapes 467 Sound and Light Signals 638 The Small Print 689 Key Points 77Index 784 International Regulations for Preventing Collisions at SeaRules PageSection III Conduct of vessels in restricted visibilityRule 19: Conduct of vessels in restricted visibility 41–42, 44PART C LIGHTS AND SHAPESRule 20: Application 46Rule 21: Definitions 47Rule 22: Visibility of lights 48Rule 23: Power-driven vessels underway 50Rule 24: Towing and pushing 52Rule 25: Sailing vessels underway and vessels under oars 54Rule 26: Fishing vessels 56Rule 27: Vessels not under command or restricted in their ability to manoeuvre 58–60Rule 28: Vessels constrained by their draught 60Rule 29: Pilot vessels 60Rule 30: Anchored vessels and vessels aground 61–62Rule 31: Seaplanes 62PART D SOUND AND LIGHT SIGNALSRule 32: Definitions 63Rule 33: Equipment for sound signals 63Rule 34: Manoeuvring and warning signals 63–64Rule 35: Sound signals in restricted visibility 65–66Rule 36: Signals to attract attention 66Rule 37: Distress signals 67PART E EXEMPTIONSRule 38: Exemptions 68ANNEXESAnnex I: Positioning and technical details of lights and shapes 69–73Annex II: Additional signals for fishing vessels fishing in close proximity 73Annex III: Technical details of sound-signal appliances 74–75Annex IV: Distress signals 76

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• Foreword 2Introduction 51 Who, Where, When? 62 Assessing the Risk 103 Narrow Channels and Separation Schemes 194 Who Gives Way? 265 Fog! 416 Lights and Shapes 467 Sound and Light Signals 638 The Small Print 689 Key Points 77Index 784 International Regulations for Preventing Collisions at SeaRules PageSection III Conduct of vessels in restricted visibilityRule 19: Conduct of vessels in restricted visibility 41–42, 44PART C LIGHTS AND SHAPESRule 20: Application 46Rule 21: Definitions 47Rule 22: Visibility of lights 48Rule 23: Power-driven vessels underway 50Rule 24: Towing and pushing 52Rule 25: Sailing vessels underway and vessels under oars 54Rule 26: Fishing vessels 56Rule 27: Vessels not under command or restricted in their ability to manoeuvre 58–60Rule 28: Vessels constrained by their draught 60Rule 29: Pilot vessels 60Rule 30: Anchored vessels and vessels aground 61–62Rule 31: Seaplanes 62PART D SOUND AND LIGHT SIGNALSRule 32: Definitions 63Rule 33: Equipment for sound signals 63Rule 34: Manoeuvring and warning signals 63–64Rule 35: Sound signals in restricted visibility 65–66Rule 36: Signals to attract attention 66Rule 37: Distress signals 67PART E EXEMPTIONSRule 38: Exemptions 68ANNEXESAnnex I: Positioning and technical details of lights and shapes 69–73Annex II: Additional signals for fishing vessels fishing in close proximity 73Annex III: Technical details of sound-signal appliances 74–75Annex IV: Distress signals 76

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• Foreword 2Introduction 51 Who, Where, When? 62 Assessing the Risk 103 Narrow Channels and Separation Schemes 194 Who Gives Way? 265 Fog! 416 Lights and Shapes 467 Sound and Light Signals 638 The Small Print 689 Key Points 77Index 784 International Regulations for Preventing Collisions at SeaRules PageSection III Conduct of vessels in restricted visibilityRule 19: Conduct of vessels in restricted visibility 41–42, 44PART C LIGHTS AND SHAPESRule 20: Application 46Rule 21: Definitions 47Rule 22: Visibility of lights 48Rule 23: Power-driven vessels underway 50Rule 24: Towing and pushing 52Rule 25: Sailing vessels underway and vessels under oars 54Rule 26: Fishing vessels 56Rule 27: Vessels not under command or restricted in their ability to manoeuvre 58–60Rule 28: Vessels constrained by their draught 60Rule 29: Pilot vessels 60Rule 30: Anchored vessels and vessels aground 61–62Rule 31: Seaplanes 62PART D SOUND AND LIGHT SIGNALSRule 32: Definitions 63Rule 33: Equipment for sound signals 63Rule 34: Manoeuvring and warning signals 63–64Rule 35: Sound signals in restricted visibility 65–66Rule 36: Signals to attract attention 66Rule 37: Distress signals 67PART E EXEMPTIONSRule 38: Exemptions 68ANNEXESAnnex I: Positioning and technical details of lights and shapes 69–73Annex II: Additional signals for fishing vessels fishing in close proximity 73Annex III: Technical details of sound-signal appliances 74–75Annex IV: Distress signals 76