IALA Markers

A buoy that indicates the general direction when approaching harbours, channels and waterway from seaward.

• Lateral Buoys

• Cardinal Buoys

• Safe Water Buoys

• Special Buoys

What type of mark is this?

• Starboard lateral mark

• Isolated danger mark

• Safe water mark

• Cardinal mark

What does a safe water mark indicate?

• There is safe water all around the mark.

• You are about to enter safe water.

• You are about to exit safe water.

What type of mark is this?

• Safe water mark

• Special mark

• Isolated danger mark

• Lateral mark

What do cardinal marks indicate?

• Port or starboard side

• Compass direction of the safest water

• Danger

• Safe water

Quick or very quick flashing white light indicates what buoy?

• North Cardinal

• West Cardinal

• Isolated Danger

• Safe Water

The duration of the light is always less than the duration of the darkness is called?

• Isophase

• Flashing

• Alternating

• Occulting

What buoy does the image indicate?

• Emergency Wreck Mark

• Special Mark

• Safe Water Mark

• South Cardinal Mark

How many miles of weather conditions a nominal range of light can be seen?

• 12

• 10

• 11

• 20

What colour are starboard lateral marks?

• Red

• Green

• Black