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Rule 21 - Definitions Light Color Arc of visibility
Masthead light White 225 deg, from 22.5 deg abaft
the beam on both sides
Port sidelight Red From directly ahead (000º R)
to 22.5 deg abaft PORT beam
Starboard sidelight Green From directly ahead (000º R)
to 22.5 deg abaft STBD beam
Stern light White 135 deg, from 22.5 deg abaft
the beam circling astern to
22.5 deg abaft the beam on
the other side<br>
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Rule 21:Definitions Sidelight Masthead light Sternlight<br>
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Light Color Arc of visibility
Towing light Yellow Same as stern light
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All-around light Various 360 deg unbroken
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Flashing light Various Flashes at regular intervals
120 flashes per minute
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Special flashing light Yellow Flashes at regular intervals 50-
70 flashes per minute,
placed as far forward as possible
between 180 deg and 225 deg
in arc, with no part exceeding
22.5 deg abaft the beam.<br>
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Rule 22 – Visibility of Lights INTERNATIONAL
Vessels > 50 meters
- masthead = 6 miles
- sidelight = 3 miles
- sternlight = 3 miles
- towing = 3 miles
- all-around = 3 miles
Vessels >12 meters but <50 meters
- masthead = 5 miles
- Vessel <20m = 3 miles
- sidelight = 2 miles
- sternlight = 2 miles
- towing = 2 miles
- all-around = 2 miles
Vessels < 12 meters
- masthead = 2 miles
- sidelight = 1 mile
- sternlight = 2 miles
- towing = 2 miles
- all-around = 2 miles
Inconspicuous, partly submerged vessels or objects
being towed
- white all-around = 3 miles INLAND
Vessels > 50 meters
- masthead = 6 miles
- sidelight = 3 miles
- sternlight = 3 miles
- towing = 3 miles
- all-around = 3 miles
- special flashing = 2 miles
Vessels >12 meters but <50 meters
- masthead = 5 miles
- Vessel <20m = 3 miles
- sidelight = 2 miles
- sternlight = 2 miles
- towing = 2 miles
- all-around = 2 miles
- special flashing = 2 miles
Vessels < 12 meters
- masthead = 2 miles
- sidelight = 1 mile
- sternlight = 2 miles
- towing = 2 miles
- all-around = 2 miles
- special flashing = 2 miles
Inconspicuous, partly submerged vessels or objects
being towed
- white all-around = 3 miles<br>
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Rule 23 – Power-driven Vessels Underway Power Driven Vessel <50m Masthead Sidelight Sternlight All
around Flashing X X Second
Masthead X<br>
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Power Driven Vessel >50m Masthead Sidelight Sternlight All
around Flashing X X X Second
Masthead X<br>
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Air Cushion Vessel - Displacement Mode Masthead Sidelight Sternlight All
around Flashing X X Second
Masthead X<br>
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Air Cushion Vessel –
Non-displacement Mode Masthead Sidelight Sternlight All
around Flashing X X Y Second
Masthead X<br>
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Rule 24 – Towing and Pushing Vessels engaged in towing (International/Inland) Masthead Sidelight Sternlight <50m
<200m W/W Y/W Second
Masthead X Towing vessel length
Length of Tow<br>
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Vessels engaged in towing
(International/Inland) Masthead Sidelight Sternlight <50m
>200m W/W/W Y/W Second
Masthead X Towing vessel length
Length of Tow<br>
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Vessels engaged in towing (International/Inland) Masthead Sidelight Sternlight >50m
<200m W/W Y/W Second
Masthead W X Towing vessel length
Length of Tow<br>
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Vessels engaged in towing
(International/Inland) Masthead Sidelight Sternlight >50m
>200m W/W/W Y/W Second
Masthead W X Towing vessel length
Length of Tow Dayshape:
when tow is over 200M<br>
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Vessel Engaged in towing (pushing ahead) - <50m
(Inland) Flashing Masthead Sidelight Sternlight W/W X Second
Masthead Y/Y<br>
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Vessel Engaged in towing (pushing ahead) - >50m
(Inland) Flashing Masthead Sidelight Sternlight W/W W X Second
Masthead Y/Y<br>
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Composite Unit - <50m
(Follows same guidelines as a vessel u/w) Flashing Masthead Sidelight Sternlight W X Second
Masthead X<br>
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Vessel Towing Alongside - <50m Flashing Masthead Sidelight Sternlight W/W X Second
Masthead Y/Y<br>
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Vessel Towing Alongside - >50m Flashing Masthead Sidelight Sternlight W/W W X Second
Masthead Y/Y<br>
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Pushed Tow (Inland) Flashing Y Masthead Sidelight Sternlight X Second
Masthead Special flashing yellow light<br>
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Vessel Being Towed Flashing Masthead Sidelight Sternlight X Second
Masthead X<br>
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Vessel Being Towed Alongside (Inland) Flashing Y Masthead Sidelight Sternlight X Second
Masthead X In an inconspicuous, partly submerged vessel or object being towed: A WHITE ALL ROUND LIGHT - 3 NM VISIBILITY<br>
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Rule 25 – Sailing Vessels Underway and Vessels Under Oars Sailing Vessel Underway Red over Green, Sailing Machine – When is this required??? Dayshape: Sailing vessel under power<br>
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Rule 26 – Fishing Vessels Trawling - <50m * Task lights are 360 deg all around visibility “Green over White
Trawling at Night” Dayshape – two cones apexes touching!<br>
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Fishing - <50m Tasking
Lights * R/W Masthead Sidelight Sternlight X Second
Masthead X * Task lights are 360 deg all around visibility “Red over White Fishing at Night” Dayshape – two cones apexes touching!<br>
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* Task lights are 360 deg all around visibility For fishing or trawling vessels, when underway but not making way, sidelights and sternlight will not be shown<br>
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Rule 27 – Vessels Not Under Command or Restricted in Their Ability to Maneuver Not Under Command * Task lights are 360 deg all around visibility “Red over Red Captain’s Dead” Dayshape – Two balls in a line<br>
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Restricted in Ability to Maneuver - <50m Dayshape – Ball Diamond Ball<br>
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* Task lights are 360 deg all around visibility. Tasking
Lights * R/W/R Masthead Sidelight Sternlight W W X Second
Masthead X Restricted in Ability to Maneuver - >50m<br>
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Vessel Engaged in Dredging - <50m * Dredging vessel displays red over red on obstructed side, green over green on clear side.<br>
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Vessel Engaged in Dredging - >50m Dayshape – Ball Diamond Ball in Middle: Two balls on Obstructed side: Two Diamonds on Safe side.
“Keep your diamonds in a safe!”<br>
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Vessel Engaged in Mine Sweeping Operations - <50m Dayshape – Three Balls – one near the foremast and one on each yardarm<br>
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Rule 28 – Vessels Constrained by Their Draft INTERNATIONAL ONLY!! Vessel Constrained by Draft - <50m Dayshape – Cylinder/can<br>
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Rule 29 – Pilot Vessels Piloting Vessels - <50m “White over Red-Pilot Ahead”<br>
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Rule 30 – Anchored Vessels and Vessels Aground Vessels at anchor shall display one all around white light where it can best be seen. (Dayshape-1 black ball)
a. Pilot vessels may leave their task lights on when
anchored.
b. Vessels over 50m in length must exhibit one all
around white light forward, and one all around
white light aft (at a lower level than the forward
light).
c. Vessels over 100m must illuminate their decks
with lights
Vessels aground shall display the same lights as required of a vessel at anchor in addition to two red task lights in a vertical line. (Dayshape-3 black balls in a vertical line)<br>
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< 50m > 50m >100m DAYSHAPE for any size anchored vessel<br>
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GERMAN NAVY VESSEL GROEMITZ
MARCH 2007<br>
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Rule 31 - Seaplanes Seaplanes will comply with lighting as closely as possible when its characteristics make normal compliance impracticable.<br>
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Memory Aids “Green over white, trawling at night”
“Red over white, fishing at night”
“Red over red, captain is dead”
“Red over green, sailing machine”
“White over Red, pilot ahead”<br>
