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Sail Skills - ColRegs
Back Free Guide to ColRegs (the International Regulations for Preventing Collisions at Sea, the IRPCS or Collision Regs).  Guidance covers all aspects with animations, pictures and diagrams.  Aimed at small vessel users but suitable for professional mariners.  Especially recommended for RYA examination candidates.
Definitions
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Manoeuvring & Warn
Vessels in sight of each other
Power-driven vessel underway
Manoeuvring as:
authorised or
required
by rules
Altering to starboard
·
May have light signal
Altering to port
· ·
Operating astern propulsion
· · ·
Any vessel
Approaching another
fail understand
intentions
actions or
In doubt sufficient action to avoid collision
.....
(or more)
Overtaking in narrow:
channel or
fairway
and
action required vessel to be overtaken
Intend to overtake to starboard
- - ·
By vessel intending to overtake
Intend to overtake to port
- - · ·
Agree
- · - ·
By vessel to be overtaken
In doubt
.....
(or more)
Nearing bend or area of channel or fairway
By vessel:
view obstructed and
hearing signal
-
Fog Signals (Signals in or Near Restricted Visibility)
Power-driven underway
making way
-
At not more than 2 minutes
stopped and not making way
-  -
Other vessels underway
not under command
- · ·
constrained by draught
sailing
restricted in ability to manoeuvre (uses same signal at anchor)
fishing (uses same signal at anchor)
towing or pushing
towed, or last vessel towed (if manned and immediately after towing vessel)
- · · ·
Anchor
restricted in ability to manoeuvre (uses same signal underway)
- · ·
fishing (uses same signal underway)
Other vessels
under 100m
Bell
At not more than 1 minute
100m or more
Bell & Gong
under 20m but 12m or more
“Efficient”
At not more than 2 minutes
Aground
under 100m
Bell, preceded and followed by three strokes
At not more than 1 minute
100m or more
Bell, preceded & followed by three strokes
& Gong
Under 12m
Appropriate signal above, or
“Efficient”
At not more than 2 minutes
Additional Optional Signals in Restricted Visibility
pilot
Identity signal
· · · ·
anchor
To warn of:
position and
possibility of collision
· - ·
aground
An “appropriate whistle” signal
Attract Attention
Any:
-
   light or
-
   sound signal
      that cannot be mistaken for any signal authorised in rules or

Shine searchlight towards danger

Light:
-
   such as cannot be mistaken for aid to navigation and
-
   not high intensity:
               intermittent or
               revolving lights
            such as strobe lights
Summary of Signals
Manoeuvring & Warn Fog Signals Attract Attention Summary Code of Signals
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