| Lateral marks. | |
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Port hand lateral marks are positioned to
mark the port hand edge of a navigable channel. They may be either can or spar
shaped, but are always coloured red. The red top mark is also can shaped.
Light: (if fitted) Red, of any rhythm that does not conflict with other local lights. |
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Starboard hand lateral marks are positioned to
mark the starboard hand edge of a navigable channel. They may be conical or spar
shaped, but are always coloured green. The green top mark is also conical. Light (if fitted): Green, of any rhythm that does not conflict with other local lights. |
| Cardinal marks. | |
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North cardinal marks are positioned at
the most northerly point of a navigational hazard. They are pillar or spar shaped,
with the upper part being black and the lower part coloured yellow. The black top
mark is formed by two cones both pointing upwards as shown. Light: White very quick flash, or quick flash. |
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East cardinal marks are positioned at the most
easterly point of a navigational hazard. They are pillar or spar shaped,
black with a wide yellow waist band. The black top mark is formed by two
cones one pointing up and the other down as shown. Light: White very quick flash, 3 every 5 seconds, or quick flash, 3 every 10 seconds. |
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South cardinal marks are positioned
at the most southerly point of a navigational hazard. They are pillar or spar shaped,
with the upper part being coloured yellow and the lower part black. The black
top mark is formed by two cones pointing down as shown. Light: White very quick flash, 6 followed by a long flash every 10 seconds, or quick flash, 6 followed by a long flash every 15 seconds. |
| West cardinal marks are positioned at the most
westerly point of a navigational hazard. They are pillar or spar shaped, coloured
yellow with a wide black waist band. The black top mark is
formed by two cones one pointing up and the other down as shown. Light: White very quick flash, 9 every 10 seconds, or quick flash, 9 every 15 seconds. |
| Isolated danger marks | |
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Isolated danger marks are positioned above any isolated
navigational hazard, which is surrounded by safe water. They may be pillar or spar
shaped, black in colour with horizontal red stripes. The black top mark is formed
by two spheres placed one above the other. Light: (if fitted) White flashing in groups of two. |
| Safe water marks. | |
| Safe water marks indicate safe deep water. The may be
of different shapes, but always have red and white vertical stripes and
a red spherical top mark. Light: (if fitted) White isophase occulting, or a long flash every ten seconds. |
| Special marks. | |
| Special marks indicate the position of any special feature. They may be of different shapes, but are always yellow with a yellow cross top mark. However, a conical shaped buoy would normally be placed in a starboard hand position. |