---
kind: "section"
citation: "29 C.F.R. § 1910.427"
title: "29"
number: "1910.427"
heading: "Liveboating."
url: "https://uscodex.org/cfr/29/1910.427"
---

# §1910.427. Liveboating.

- (a) **General.** Employers engaged in diving operations involving liveboating shall comply with the following requirements.
- (b) **Limits.** Diving operations involving liveboating shall not be conducted:
  - (1) With an inwater decompression time of greater than 120 minutes;
  - (2) Using surface-supplied air at depths deeper than 190 fsw, except that dives with bottom times of 30 minutes or less may be conducted to depths of 220 fsw;
  - (3) Using mixed gas at depths greater than 220 fsw;
  - (4) In rough seas which significantly inpede diver mobility or work function; or
  - (5) **In other than daylight hours.**
- (c) **Procedures.**
  - (1) The propeller of the vessel shall be stopped before the diver enters or exits the water.
  - (2) A device shall be used which minimizes the possibility of entanglement of the diver's hose in the propeller of the vessel.
  - (3) Two-way voice communication between the designated person-in-charge and the person controlling the vessel shall be available while the diver is in the water.
  - (4) A standby diver shall be available while a diver is in the water.
  - (5) A diver-carried reserve breathing gas supply shall be carried by each diver engaged in liveboating operations.

## Notes

### Authority

Authority: 29 U.S.C. 653, 655, 657; 40 U.S.C. 333; 33 U.S.C. 941; Secretary of Labor's Order No. 8-76 (41 FR 25059), 9-83 (48 FR 35736), 1-90 (55 FR 9033), 6-96 (62 FR 111), 3-2000 (65 FR 50017), 5-2002 (67 FR 65008), 5-2007 (72 FR 31160), or 4-2010 (75 FR 55355) as applicable, and 29 CFR 1911.

### Source

Source: 42 FR 37668, July 22, 1977, unless otherwise noted.

### Authority

Authority: 33 U.S.C. 941; 29 U.S.C. 653, 655, 657; Secretary of Labor's Order No. 12-71 (36 FR 8754); 8-76 (41 FR 25059), 9-83 (48 FR 35736), 1-90 (55 FR 9033), 6-96 (62 FR 111), 3-2000 (65 FR 50017), 5-2002 (67 FR 65008), 5-2007 (72 FR 31160), 4-2010 (75 FR 55355), 1-2012 (77 FR 3912), 08-2020 (85 FR 58393), or 07-2025 (90 FR 27878); 29 CFR part 1911; and 5 U.S.C. 553, as applicable.

### Source

Source: 39 FR 23502, June 27, 1974, unless otherwise noted.

### Source

Source: 39 FR 23502, June 27, 1974, unless otherwise noted. Redesignated at 40 FR 23072, May 28, 1975.