
From the U.S. Code Online via GPO Access
[wais.access.gpo.gov]
[Laws in effect as of January 2, 2001]
[Document not affected by Public Laws enacted between
  January 2, 2001 and January 28, 2002]
[CITE: 33USC2022]

 
                TITLE 33--NAVIGATION AND NAVIGABLE WATERS
 
                  CHAPTER 34--INLAND NAVIGATIONAL RULES
 
                           SUBCHAPTER I--RULES
 
                        Part C--Lights and Shapes
 
Sec. 2022. Visibility of lights (Rule 22)

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

(a) Vessels of 50 meters or more in length

    In a vessel of 50 meters or more in length:
        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; and
        a special flashing light, 2 miles.

(b) Vessels of 12 meters or more but less than 50 meters in length

    In a vessel of 12 meters or more in length but less than 50 meters 
in length:
        a masthead light, 5 miles; except that where the length of the 
    vessel is less than 20 meters, 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; and
        a special flashing light, 2 miles.

(c) Vessels of less than 12 meters in length

    In a vessel of less than 12 meters 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; and
        a special flashing light, 2 miles.

(d) Inconspicuous, partly submerged vessels or objects being towed

    In an inconspicuous, partly submerged vessel or object being towed:
        a white all-round light, 3 miles.

(Pub. L. 96-591, Sec. 2, Dec. 24, 1980, 94 Stat. 3424.)

                       References in Text

    These Rules, referred to in text, are the Inland Navigational Rules 
which are classified to this subchapter.
    Annex I to these Rules, referred to in text, is to be established by 
the Secretary under section 2071 of this title.

                          Codification

    Section was enacted as part of section 2 of Pub. L. 96-591 which 
enacted the Inland Navigational Rules which comprise this subchapter.

                  Section Referred to in Other Sections

    This section is referred to in sections 2020, 2031, 2038 of this 
title.
