IALA B Lateral Marks

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Lateral Marks

Theory

Define the edges of a navigable channel, most commonly when entering/leaving harbours

IALA Buoyage System B

IALA Buoyage System B Lateral Marks are used in the majority of the world including the Americas, South Korea, Japan, the Philippines and the eastern Pacific. The a lot of their characterics are generally opposite to Lateral Marks found in IALA A Systems but there are similar characterics between the two systems:

  • If numbered, Starboard Lateral Marks will always have odd numbers, while Port will always have even numbers
  • Top Marks for Starboard is always Conical or Pointed, while Port will always be a Square or Flat Top


Port Lateral Buoy


Colour
Green
Shapes
Conical, Cylindrical, Pillar, Spar
Numbering
Even Numbers
Top Marks
Square or Flat top
Lights
Green Multiple combinations
Chart Symbol
PORT Lateral Mark - IALA Buoyage System B - Chart Symbol

Starboard Lateral Buoy


Colour
Red
Shapes
Conical, Cylindrical, Pillar, Spar
Numbering
Odd Numbers
Top Marks
Conical or Pointed Top
Lights
Red Multiple combinations
Chart Symbol
STARBOARD Lateral Mark - IALA Buoyage System B - Chart Symbol