Section 8104 prescribes certain working hours and conditions under which working hours are set. The Committee intends that these sections be interpreted in a manner consistent with one another.

Subsection (a) permits an individual to take charge of the deck watch on leaving port and immediately thereafter only if the individual has been off duty for 6 of the 12 hours immediately prior to departure.

Subsection (b) prohibits a licensed individual from being required to work more than 9 of 24 hours in port or more than 12 of 24 hours at sea on an oceangoing or coastwise vessel of not more than 100 gross tons, except in an emergency.

Subsection (c) prescribes a maximum 8-hour day for licensed individuals and seamen on towing vessels operating on the Great Lakes and certain connecting or tributary waters.

Subsection (d) requires certain members of the complement of certain merchant vessels of more than 100 gross tons to be divided into at least 3 successive watches when at sea. This requirement applies to radio officers only when at least 3 radio officers are employed. Subsection (d) also prescribes a maximum 8-hour work day for licensed individuals and seamen on these vessels.

For the Great Lakes towing vessels and merchant vessels in subsections (c) and (d), subsection (e) requires that seamen be hired only for work in either the deck or the engine department. When in a safe harbor, seamen may be required to do only necessary work on Sundays and certain holidays, unless the vessel is getting underway on a voyage. Further, when in a safe harbor, this subsection restates the maximum 8-hour work day which applies even for anchor watch.

Subsection (f) states that the limitations in subsections (d) and (e) do not apply if the master or other officer decides the crew is needed for certain routine, safety, or rescue activities.

Subsection (g) provides that for a towing vessel (except a Great Lakes towing vessel under subsection (c)), offshore supply vessel, or barge on a voyage of less than 600 miles, the licensed officers and certain crewmembers may be divided into not less than two watches when at sea.

Subsection (h) provides that the licensed operator for a towing vessel at least 26 feet long may not be required to work more than 12 of 24 hours, except in an emergency.

Subsections (i) and (j) prescribe penalties for violations of the provisions of this section and, in certain instances, entitles the seaman to discharge and payment of wages.

2021—Subsec. (c). Pub. L. 116–283, § 8505(b)(9)(A), substituted “an individual” for “a licensed individual or seaman”.

Subsec. (d). Pub. L. 116–283, § 8505(b)(9)(B), substituted “An individual” for “A licensed individual or seaman”.

Subsec. (e). Pub. L. 116–283, § 8505(b)(9)(C), substituted “an individual” for “a seaman” in pars. (1) and (2).

Subsec. (j). Pub. L. 116–283, § 8505(b)(9)(D), substituted “individual” for “seaman”.

2014—Subsec. (d). Pub. L. 113–281, § 316(1), substituted “and oilers” for “coal passers, firemen, oilers, and water tenders”.

Subsec. (g)(1). Pub. L. 113–281, § 316(2), struck out “(except the coal passers, firemen, oilers, and water tenders)” after “crewmembers”.

2010—Subsec. (g). Pub. L. 111–281, § 617(d), designated existing provisions as par. (1) and added par. (2).

Subsec. (o). Pub. L. 111–281, § 903(a)(1), made technical amendment to directory language of Pub. L. 109–241, § 311(b). See 2006 Amendment note below.

2006—Subsec. (o). Pub. L. 109–241, as amended by Pub. L. 111–281, § 903(a)(1), substituted “or less than 500 gross tons as measured under section 14502 of this title, or is less than 2,500 gross tons as measured under section 14302 of this title” for “or an alternate tonnage measured under section 14302 of this title as prescribed by the Secretary under section 14104 of this title” in pars. (1) and (2).

1996—Subsec. (b). Pub. L. 104–324, § 728(1), inserted “as measured under section 14502 of this title, or an alternate tonnage measured under section 14302 of this title as prescribed by the Secretary under section 14104 of this title” after “100 gross tons”.

Subsec. (c). Pub. L. 104–324, § 1114(a), struck out “or permitted” after “required” and inserted “or permitted to work more than 15 hours in any 24-hour period, or more than 36 hours in any 72-hour period” after “day”.

Subsec. (d). Pub. L. 104–324, § 728(2), inserted “as measured under section 14502 of this title, or an alternate tonnage measured under section 14302 of this title as prescribed by the Secretary under section 14104 of this title” after “100 gross tons” and after “5,000 gross tons”.

Subsec. (e). Pub. L. 104–324, § 1114(b), substituted “subsection (d)” for “subsections (c) and (d)” in introductory provisions.

Subsec. (g). Pub. L. 104–324, § 1114(c), struck out “(except a vessel to which subsection (c) of this section applies)” after “On a towing vessel”.

Subsec. (l)(1). Pub. L. 104–324, § 728(3), inserted “as measured under section 14502 of this title, or an alternate tonnage measured under section 14302 of this title as prescribed by the Secretary under section 14104 of this title” after “1,600 gross tons”.

Subsec. (m)(1). Pub. L. 104–324, § 728(4), inserted “as measured under section 14502 of this title, or an alternate tonnage measured under section 14302 of this title as prescribed by the Secretary under section 14104 of this title” after “1,600 gross tons”.

Subsec. (o)(1). Pub. L. 104–324, § 728(5), inserted “as measured under section 14502 of this title, or an alternate tonnage measured under section 14302 of this title as prescribed by the Secretary under section 14104 of this title” after “500 gross tons”.

Subsec. (o)(2). Pub. L. 104–324, § 728(6), inserted “as measured under section 14502 of this title, or an alternate tonnage measured under section 14302 of this title as prescribed by the Secretary under section 14104 of this title” after “500 gross tons”.

Subsec. (p). Pub. L. 104–324, § 1104(c), amended subsec. (p) generally. Prior to amendment, subsec. (p) read as follows: “On a vessel used only to respond to a discharge of oil or a hazardous substance, the licensed individuals and crewmembers may be divided into at least two watches when the vessel is engaged in an operation less than 12 hours in duration.”

1993—Subsec. (g). Pub. L. 103–206, § 322(a)(1), struck out “a vessel used only to respond to a discharge of oil or a hazardous substance,” after “an offshore supply vessel,”.

Subsec. (p). Pub. L. 103–206, § 322(a)(2), added subsec. (p).

1992—Subsec. (g). Pub. L. 102–587, § 5212(1), inserted “a vessel used only to respond to a discharge of oil or a hazardous substance,” after “an offshore supply vessel,”.

Subsecs. (n), (o). Pub. L. 102–587, § 5212(2), redesignated subsec. (n), relating to fish tender vessels of not more than 500 gross tons engaged in Aleutian trade, as (o).

1990—Subsecs. (i), (j). Pub. L. 101–380, § 4302(f), substituted “$10,000” for “$100” in subsec. (i) and for “$500” in subsec. (j).

Subsec. (n). Pub. L. 101–595 added subsec. (n) relating to fish tender vessels of not more than 500 gross tons engaged in Aleutian trade.

Pub. L. 101–380, § 4114(b), added subsec. (n) relating to tankers.

1986—Subsec. (k). Pub. L. 99–307 substituted “watches” for “watchers”.

1984—Subsec. (b). Pub. L. 98–364, § 402(11)(A), substituted “100 gross tons (except a fishing, fish processing, or fish tender vessel)” for “100 gross tons”.

Subsec. (c). Pub. L. 98–364, § 402(11)(B), substituted “fishing, fish processing, fish tender,” for “fishing”.

Subsec. (d). Pub. L. 98–364, § 402(11)(C), substituted “a fishing, fish tender, or whaling vessel, a fish processing vessel of not more than 5,000 gross tons” for “a fishing or whaling vessel”.

Subsec. (k). Pub. L. 98–557 substituted “shall” for “may”.

Pub. L. 98–364, § 402(11)(D), added subsec. (k).

Subsec. (l). Pub. L. 98–557 substituted “shall” for “may” in provisions preceding par. (1).

Pub. L. 98–364, § 402(11)(D), added subsec. (l).

Subsec. (m). Pub. L. 98–364, § 402(11)(D), added subsec. (m).

Pub. L. 111–281, title IX, § 903(a), Oct. 15, 2010, 124 Stat. 3010, provided that the amendment by section 903(a)(1) is effective with enactment of Pub. L. 109–241.

Amendment by Pub. L. 101–380 applicable to incidents occurring after Aug. 18, 1990, see section 1020 of Pub. L. 101–380, set out as an Effective Date note under section 2701 of Title 33, Navigation and Navigable Waters.

Pub. L. 117–263, div. K, title CXV, § 11508, Dec. 23, 2022, 136 Stat. 4137, provided that:

[For definition of “Secretary” as used in section 11598 of Pub. L. 117–263, set out above, see section 11002 of Pub. L. 117–263, set out as a note under section 106 of Title 14, Coast Guard.]