Other MarkIALA System
Safe Water Mark
Identification guide and characteristics for safe navigation.
Indicates that there is navigable water all around the mark. Often used as a mid-channel mark, fairway mark, or landfall buoy.
👁️ Visual Characteristics
Color Scheme
Red and White vertical stripes
Topmark
Single Red Sphere
Buoy Shape
Spherical, Pillar, or Spar
💡 Night Identification (Light)
Color of Light
White
Light Rhythm
Isophase, Occulting, Long Flashing 10s, or Morse 'A'
IALA Regions
The world is divided into two IALA regions (A and B). While Cardinal, Isolated Danger, Safe Water, and Special marks are the same globally, Lateral Marks have different color conventions depending on the region.
- Region A: Europe, Australia, New Zealand, Africa, Gulf and some Asian countries.
- Region B: Americas, Japan, South Korea, Philippines.