Rule 22: Visibility of Lights | Lights & Shapes In Depth

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---------ABOUT THE VIDEO---------

This video was originally uploaded to our other channel, Casual Navigation, back in 2018.

This video is an "in depth" look at Rule 22 of the International Regulations for Preventing Collisions at Sea. Rule 22 continues the section looking at Light and Shapes of different vessels. This rule defines the range at which you must see the lights of different vessels.

---------RULE 22---------

Rule 22: Visibility of lights

The lights prescribed in these Rules shall have an intensity as specified in Section 8 of Annex I to these Regulations so as to be visible at the following minimum ranges:

(a) In vessels of 50 metres or more in length:
◦ a masthead light, 6 miles;
◦ a sidelight, 3 miles;
◦ a stern light, 3 miles;
◦ a towing light, 3 miles;
◦ a white, red, green or yellow all-round light, 3 miles.

(b) In vessels of 12 metres or more in length but less than 50 metres in length:
◦ 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.

(c) In vessels of less than 12 metres in length:
◦ 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.

(d) In inconspicuous, partly submerged vessels or objects being towed:
◦ a white all-round light, 3 miles.


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