---
kind: "section"
citation: "46 C.F.R. § 15.710"
title: "46"
number: "15.710"
heading: "Working hours."
url: "https://uscodex.org/cfr/46/15.710"
---

# §15.710. Working hours.


In addition to prescribing watch requirements, [46 U.S.C. 8104](/usc/46/8104.md) sets limitations on the working hours of credentialed officers and crew members, prescribes certain rest periods, and prohibits unnecessary work on Sundays and certain holidays when the vessel is in a safe harbor. It is the responsibility of the Master or Person in Charge to ensure that these limitations are met. However, under [46 U.S.C. 8104(f)](/usc/46/8104.md?p=f), the Master or other credentialed officer can require any part of the crew to work when, in their judgment, they are needed for:

- (a) Maneuvering, shifting berth, mooring, unmooring;
- (b) Performing work necessary for the safety of the vessel, or the vessel's passengers, crew, or cargo;
- (c) Saving of life onboard another vessel in jeopardy; or,
- (d) **Performing fire, lifeboat, or other drills in port or at sea.**

## Notes

### Amendments

[CGD 81-059, 52 FR 38652, Oct. 16, 1987, as amended by USCG-2004-18884, 69 FR 58343, Sept. 30, 2004; USCG-2006-24371, 74 FR 11261, Mar. 16, 2009; USCG-2004-17914, 78 FR 78005, Dec. 24, 2013]

### Source

Source: CGD 81-059, 52 FR 38652, Oct. 16, 1987, unless otherwise noted. Redesignated by USCG-2004-17914, 78 FR 78001, Dec. 24, 2013.

### Authority

Authority: 46 U.S.C. 2101, 2103, 3306, 3703, 8101, 8102, 8103, 8104, 8105, 8301, 8304, 8502, 8503, 8701, 8702, 8901, 8902, 8903, 8904, 8905(b), 8906 and 9102; sec. 617, Pub. L. 111-281, 124 Stat. 2905; and DHS Delegation No. 00170.1, Revision No. 01.4.

### Source

Source: CGD 81-059, 52 FR 38652, Oct. 16, 1987, as amended by USCG-2021-0097, 89 FR 93118, Nov. 25, 2024, unless otherwise noted.

### Amendments

[CGD 81-059, 52 FR 38652, Oct. 16, 1987, as amended by USCG-2004-18884, 69 FR 58343, Sept. 30, 2004; USCG-2006-24371, 74 FR 11261, Mar. 16, 2009; USCG-2004-17914, 78 FR 78005, Dec. 24, 2013]