PART 82—72 COLREGS: INTERPRETATIVE RULES Authority: 14 U.S.C. 102, 503; 33 U.S.C. 1602; E.O. 11964, 42 FR 4327, 3 CFR, 1977 Comp., p. 88; 49 CFR 1.46(n). § 82.1 Purpose. This part contains the interpretative rules concerning the 72 COLREGS that are adopted by the Coast Guard for the guidance of the public. [CGD 76-133, 42 FR 35792, July 11, 1977. Redesignated by CGD 81-017, 46 FR 28154, May 26, 1981] § 82.3 Pushing vessel and vessel being pushed: Composite unit. Rule 24(b) of the 72 COLREGS states that when a pushing vessel and a vessel being pushed ahead are rigidly connected in a composite unit, they are regarded as a power-driven vessel and must exhibit the lights under Rule 23. A “composite unit” is interpreted to be a pushing vessel that is rigidly connected by mechanical means to a vessel being pushed so they react to sea and swell as one vessel. “Mechanical means” does not include the following: (a) Lines. (b) Hawsers. (c) Wires. (d) Chains. [CGD 76-133, 42 FR 35792, July 11, 1977. Redesignated by CGD 81-017, 46 FR 28154, May 26, 1981] § 82.5 Lights for moored vessels. For the purposes of Rule 30 of the 72 COLREGS, a vessel at anchor [CGD 94-011, 63 FR 5731, Feb. 4, 1998, as amended by USCG-2015-0433, 80 FR 44280, July 27, 2015; USCG-2016-0498, 82 FR 35080, July 28, 2017] § 82.7 Sidelights for unmanned barges. An unmanned barge being towed may use the exception of COLREGS Rule 24(h). However, this exception only applies to the vertical sector requirements. [CGD 94-011, 63 FR 5731, Feb. 4, 1998]