We've made some important changes to our Privacy and Cookies Policy and we want you to know what this means for you and your data.

Manage

Lateral Marks

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

Test Summary

  • 36 Tests Taken
  • 75% Average Score
Take Test

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
Lateral Marks - IALA B - Direction of Buoyage

Port Lateral Buoy

Lateral Marks - IALA B - Port
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

Lateral Marks - IALA B - Starboard
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