COLREGS - The Rules are divided into five parts A-E - General Rules (A), Steering and Sailing (B), Lights and Shapes (C), Sound and Light (D) and Exemptions (E).

Rule 5 requires that:

 "Every vessel shall at all times maintain a proper look-out by sight and hearing as well as by all available means appropriate in the prevailing circumstances and conditions so as to make a full appraisal of the situation and of the risk of collision."

Rule 1 states that the rules apply to all vessels on the high seas and connected waters.
Rule 2 covers the responsibility of the master, owner and crew to comply with the rules.
Rule 3 includes definitions of applicable water craft (vessels).
Rule 4 says the section applies in any conditions of visibility.
Rule 5 every vessel shall at all times maintain a proper look-out by sight and hearing.
Rule 6 deals with safe speed.

Rule 7 risk assumptions shall not be made on scanty (radar) information.
Rule 8 covers action to be taken to avoid collision.
Rule 9 vessels proceeding along a narrow channel should keep to starboard.
Rule 10 deals with the behaviour of vessels in or near traffic separation schemes. 

Part C - LIGHTS & SHAPES (Rules 20-31)

Part D - SOUND AND LIGHT SIGNALS - DEFINITIONS (Rules 32-37)

Part E - EXEMPTIONS - Rule 38

Part F - Convention compliance verification provisions Rules 39 - 41

Annex I - Positioning and technical details of lights and shapes

Annex II - Additional signals for fishing vessels fishing in close proximity

Annex III - Technical details of sounds signal appliances

Annex IV - Distress signals indicating distress and need of assistance

International Maritime Organization (IMO)

4 Albert Embankment, London SE1 7SR

United Kingdom
+44 (0) 20 7735 7611

LINKS & REFERENCE

http://www.solarnavigator.net/boats/collision_at_sea_regulations_colregs.htm

https://www.bluebird-electric.net/COLREGS_International_Regulations_for_Preventing_Collisions_at_Sea_1972.htm