The Navigation Rules, Explained

Every rule from 1 to 38, with a short answer first, the official text, International vs Inland differences, and a quick quiz. Last reviewed October 21, 2026.

1. Rule 1: Application
2. Rule 2: Responsibility
3. Rule 3: General Definitions
4. Rule 4: Application (Any Condition of Visibility)
5. Rule 5: Look-out
6. Rule 6: Safe Speed
7. Rule 7: Risk of Collision
8. Rule 8: Action to Avoid Collision
9. Rule 9: Narrow Channels
10. Rule 10: Traffic Separation Schemes
11. Rule 11: Application (Vessels in Sight of One Another)
12. Rule 12: Sailing Vessels
13. Rule 13: Overtaking
14. Rule 14: Head-on Situation
15. Rule 15: Crossing Situation
16. Rule 16: Action by Give-way Vessel
17. Rule 17: Action by Stand-on Vessel
18. Rule 18: Responsibilities Between Vessels
19. Rule 19: Conduct of Vessels in Restricted Visibility
20. Rule 20: Application (Lights and Shapes)
21. Rule 21: Definitions (Lights)
22. Rule 22: Visibility of Lights
23. Rule 23: Power-driven Vessels Underway
24. Rule 24: Towing and Pushing
25. Rule 25: Sailing Vessels Underway and Vessels Under Oars
26. Rule 26: Fishing Vessels
27. Rule 27: Vessels Not Under Command or Restricted in Their Ability to Maneuver
28. Rule 28: Vessels Constrained by Their Draft
29. Rule 29: Pilot Vessels
30. Rule 30: Anchored Vessels and Vessels Aground
31. Rule 31: Seaplanes
32. Rule 32: Definitions (Sound Signals)
33. Rule 33: Equipment for Sound Signals
34. Rule 34: Maneuvering and Warning Signals
35. Rule 35: Sound Signals in Restricted Visibility
36. Rule 36: Signals to Attract Attention
37. Rule 37: Distress Signals
38. Rule 38: Exemptions

Rules 39 to 41 (International Part F) are coming soon.