Skip to content
Master COLREGS
Home
COLREGs Online
Part A
Rule 1 Application
Rule 2 Responsibility
Rule 3 General Definitions
Part B
Rule 4 Application
Rule 5 Look-out
Rule 6 Safe Speed
Rule 7 Risk of Collision
Rule 8 Action to avoid Collision
Rule 9 Narrow Channels
Rule 10 Traffic Separation Schemes
Rule 11 Application
Rule 12 Sailing Vessels
Rule 13 Overtaking
Rule 14 Head-on Situation
Rule 15 Crossing Situation
Rule 16 Action by give way vessel
Rule 17 Action by stand on vessel
Rule 18 Responsibilities between Vessels
Rule 19 Conduct of vessels in restricted visibility
Part C
Rule 20 Application
Rule 21 Definitions
Rule 22 Visibility of Lights
Rule 23 Power-driven Vessels underway
Rule 24 Towing and Pushing
Rule 25 Sailing Vessels underway and Vessels under Oars
Rule 26 Fishing Vessels
Rule 27 Vessels not under Command or Restricted in their Ability to Manoeuvre
Rule 28 Vessel constrained by their draught
Rule 29 Pilot Vessels
Rule 30 Anchored Vessels and Vessels aground
Rule 31 Seaplanes
Part D
Rule 32 Definitions
Rule 33 Equipment for Sound Signals
Rule 34 Manoeuvring and Warning Signals
Rule 35 Sound Signals in restricted Visibility
Rule 36 Signals to attract Attention
Rule 37 Distress Signals
Learning Tools
Memory Trainer
COLREGs Study Program
Flash Cards
Become a Member
Videos
Articles
Log In
Master COLREGS
Navigation Menu
Navigation Menu
Home
COLREGs Online
Part A
Rule 1 Application
Rule 2 Responsibility
Rule 3 General Definitions
Part B
Rule 4 Application
Rule 5 Look-out
Rule 6 Safe Speed
Rule 7 Risk of Collision
Rule 8 Action to avoid Collision
Rule 9 Narrow Channels
Rule 10 Traffic Separation Schemes
Rule 11 Application
Rule 12 Sailing Vessels
Rule 13 Overtaking
Rule 14 Head-on Situation
Rule 15 Crossing Situation
Rule 16 Action by give way vessel
Rule 17 Action by stand on vessel
Rule 18 Responsibilities between Vessels
Rule 19 Conduct of vessels in restricted visibility
Part C
Rule 20 Application
Rule 21 Definitions
Rule 22 Visibility of Lights
Rule 23 Power-driven Vessels underway
Rule 24 Towing and Pushing
Rule 25 Sailing Vessels underway and Vessels under Oars
Rule 26 Fishing Vessels
Rule 27 Vessels not under Command or Restricted in their Ability to Manoeuvre
Rule 28 Vessel constrained by their draught
Rule 29 Pilot Vessels
Rule 30 Anchored Vessels and Vessels aground
Rule 31 Seaplanes
Part D
Rule 32 Definitions
Rule 33 Equipment for Sound Signals
Rule 34 Manoeuvring and Warning Signals
Rule 35 Sound Signals in restricted Visibility
Rule 36 Signals to attract Attention
Rule 37 Distress Signals
Learning Tools
Memory Trainer
COLREGs Study Program
Flash Cards
Become a Member
Videos
Articles
Log In
prolonged blast
The term ‘prolonged blast’ means a blast of from four to six seconds’s duration.Â