Coast Guard Test Aids to Navigation

Question 1

What color is a port-side buoy (left side when returning from sea) in the US lateral marking system?

Accepted Answer

Red

Answer

Green

Answer

White

Answer

Yellow

Question 2

What shape is a nun buoy?

Accepted Answer

Conical (pointed top)

Answer

Cylindrical (flat top)

Answer

Spherical

Answer

Diamond-shaped

Question 3

What does a flashing green light on a buoy indicate?

Accepted Answer

Port side of channel when entering from sea

Answer

Starboard side of channel when entering from sea

Answer

Danger area

Answer

Safe water mark

Question 4

What does a safe water mark (fairway buoy) look like?

Accepted Answer

Red and white vertical stripes

Answer

Black and red horizontal bands

Answer

Yellow with an X

Answer

Green and white stripes

Question 5

What is the significance of the number on a lateral buoy?

Accepted Answer

Odd numbers on port side, even numbers on starboard side entering from sea

Answer

Even numbers on port side, odd numbers on starboard side entering from sea

Answer

Numbers indicate water depth

Answer

Numbers indicate distance from shore

Question 6

What does a yellow buoy primarily indicate?

Accepted Answer

Special purpose or caution area

Answer

Safe water mark

Answer

Isolated danger

Answer

Port side of channel