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Daymarks
These are shown by day on vessels to denote activities in which the vessels are engaged.
Lights
Lights are shown by vessels from Sunset to Sunrise and during the day in poor visibility.
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ARCS OF VISIBILITY OF A VESSEL'S NAVIGATION LIGHTS
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LIGHTS
View from Ahead View from Astern View from Port Side
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Power Driven Vessel Over 50m Underway
Daymark None
Lights Two White Masthead Lights, Red and Green Sidelights, White Sternlight
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Power Driven Vessel Under 50m Underway
Daymark None
Lights White Masthead Lights, Red and Green Sidelights, White Sternlight
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Sailing Vessel Underway Not Using Power
Daymark None
Lights Red and Green Sidelights, White Sternlight
Vessels Under 12m
Sidelights and Sternlight may be combined into one Masthesd Lantern
Vessels Under 7m and Vessels Under oars
White light in sufficient time to prevent collision
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Vessel At Anchor
Daymark  One Black Ball in forepart of Vessel
Lights Two all-round White Lights, Aft lower that Fore; Vessels under 50m need only show the higher light; Vessels over 100m also illuminate their decks
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FOR THE REST OF THIS SECTION THE FOREGOING ARE REFEERED TO AS NORMAL NAVIGATION LIGHTS OR MARKS AND ANCHOR LIGHTS AS APPROPRIATE
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Vessels Fishing and Trawling
Daymark  Two Black Cones points together
If gear extends over 150m from vessel, One Black cone point up in direction of gear
Lights
Vessels Fishing Two all-round Lights Red over White, White Masthead Light (optional for vessels under 50m), If gear extends over 150m from vessel, One all-roune White Light in direction of gear; If underway Red and Green Sidelights and White Stern Light
Vessels Trawling Two all-round Lights Green over White, White Masthead Light (optional for vessels under 50m), If underway Red and Green Sidelights and White Stern Light
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Sailing Vessel Motorsailing
Daymark  One Black cone point down, forward where best seen
Lights As for Power driven Vessels
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Pilot Vessel on Duty
Daymark  Pilot Jack
Lights Two all-round lights - White over Red,
If underway Red and Green Sidelights and White Sternlight, If at anchor - anchor Lights
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Vessel Constrained by Her Draught
Daymark  One Black Cylinder
Lights Three all-round Red Lights, Normal Navigation Lights
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Vessel Restricted in Her Ability to Manoeuvre
Daymark  Black Ball over Black Diamond over Black Ball;
Plus anchor shape when at anchor
Lights Three all-round Lights Red over White over Red; Normal Navigation Lights
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Vessel Engaged in Underwater Operations or Dredging
Daymarks 
As for vessel Restricted in Her Ability To Manoeuvre, plus Two Black Balls on the side of the Obstruction, and Two Black Diamonds on the side on which the vessel may pass. Vessels too small to show the above marks show a rigid replica of code flag ‘A’ at least 1m high
Lights As for vessel Restricted in Her Ability To Manoeuvre, plus Two all-round red Lights on the side of the obstruction, and two all-round Green Lights on the side the vessel may pass
When making way, normal Navigation lights are shown but Anchor Lights are not shown when the vessel is at anchor
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Vessel Towing - Length of Tow less than 200m (Measured from Stern of Towing Vessel to Stern of Vessel Towed)
Daymark None
Lights Two White Masthead Lights, Yellow Towing Light above Stern Light, Red and Green Sidelights, Vessel Towed shows Side and Stern Lights
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Vessel Towing - Length of Tow over 200m
Daymark 
One Black Diamond on Vessel Towing, One Black Diamond on Vessel Towed
Lights Three White Masthead Lights, Yellow Towing Light above Stern Light, Red and Green Sidelights, Vessel Towed shows Side and Stern Lights
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Vessel Engaged in Minesweeping (Dangerous to approach within 1000m astern or 500m each side)
Daymarks  Three Black Balls
Lights Three all-round Green Lights, Normal Navigation lights
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Vessel Aground (NOT Distress)
Daymark  Three Black Balls
Lights Two all-round Red Lights, Anchor lights
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Vessel Not Under Command
Daymark  Two Black Balls
Lights Two all-round Red Lights, If underway Red and Green sidelights, White sternlights
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