Visibility of Lights

Question 1

Lights: In vessels of 50m or more in length

Answer 1

Masthead light (6 miles)
sidelight (3 miles)
Sternlight (3 miles)

Question 2

Lights: In vessels of less than 50 but more than 20m in length

Answer 2

Masthead >20 metres (5 miles)
Sidelight (2 miles)
Sternlight (2 miles)
A white, red, green or yellow all-round light (2 miles)

Question 3

Lights: In vessels of less than 12 metres in length

Answer 3

masthead (2 miles)
sidelight (1 mile)
Sternlight (2 miles)
towing light (2 miles)
a white, red, green or yellow all-round light (2 miles)

Question 4

Lights: In inconspicuous, partly submerged vessels or objects being towed

Answer 4

A white all-round light (3 miles)

Question 5

Lights: A vessel of less than 20m but more than 12m

Answer 5

Masthead <20 metres (3 miles)
Sidelight (2 miles)
Sternlight (2 miles)
A white, red, green or yellow all-round light (2 miles)