1910.427(a)

General. Employers engaged in diving operations involving liveboating shall comply with the following requirements.

1910.427(b)

Limits. Diving operations involving liveboating shall not be conducted:

1910.427(b)(1)

With an inwater decompression time of greater than 120 minutes;

1910.427(b)(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;

1910.427(b)(3)

Using mixed gas at depths greater than 220 fsw;

1910.427(b)(4)

In rough seas which significantly impede diver mobility or work function; or

1910.427(b)(5)

In other than daylight hours.

1910.427(c)

Procedures.

1910.427(c)(1)

The propeller of the vessel shall be stopped before the diver enters or exits the water.

..1910.427(c)(2)

1910.427(c)(2)

A device shall be used which minimizes the possibility of entanglement of the diver's hose in the propeller of the vessel.

1910.427(c)(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.

1910.427(c)(4)

A standby diver shall be available while a diver is in the water.

1910.427(c)(5)

A diver-carried reserve breathing gas supply shall be carried by each diver engaged in liveboating operations.