Navigation light requirements (Rule 21-22)

Question 1

(Rule 22) Vessels 50m or longer must have lights visible at these ranges.

Answer 1

a masthead light, 6 miles;
a sidelight, 3 miles;
a sternlight, 3 miles;
a towing light, 3 miles;
a white, red, green or yellow all-round light, 3 miles

Question 2

(Rule 22) vessels of 12m or more in length but less than 50m in length must have lights visible at these ranges

Answer 2

a masthead light, 5 miles; except that where the length of the vessel is less than 20 metres, 3 miles;
a sidelight, 2 miles;
a sternlight, 2 miles;
a towing light, 2 miles;
a white, red, green or yellow all-round light, 2 miles

Question 3

(Rule 22) vessels of less than 12m in length must have lights visible at these ranges

Answer 3

a masthead light, 2 miles;
a sidelight, 1 mile;
a sternlight, 2 miles;
a towing light, 2 miles;
a white, red, green or yellow all-round light, 2 miles

Question 4

(Rule 22) inconspicuous, partly submerged vessels or objects being towed must have lights visible at these ranges

Answer 4

a white all-round light, 3 miles

Question 5

(Rule 22) Canadian Modifications

Answer 5

Vessels being pushed ahead- exhibit a special flashing light, 2 miles
Any government or law enforcement vessels with a specific task- blue flashing light, 2 miles

Question 6

(Rule 21) Masthead light

Answer 6

White light
Showing an arc of unbroken light over 225 degrees from right ahead to 22.5 degrees abaft the beam on each side

Question 7

(Rule 21) Sidelights

Answer 7

Green light on starboard
Red light on port
Each showing unbroken light from right ahead to 22.5 degrees abaft the beam on either side

Question 8

(Rule 21) Sternlight

Question 9

(Rule 21) Towing light

Question 10

(Rule 21) All-round light

Question 11

(Rule 21) Flashing light

Question 12

(Rule 21) Canadian Mods: Special flashing light

Question 13

(Rule 21) Canadian Mods: Blue flashing light