Hang on, we're gonna be able to get there based on precedent.
So, your estimate is that the rule would be covering pools, lakes, shore dives and uninspected vessels.
Well, the rule above is the result of a variance originally requested by Dixie Divers LLC of Florida. The reason why they wanted the variance, was because the existing OSHA standards required that a chamber be on site (the diving location) if their dive guides and instructors dove nitrox. Hang on, switching back to the big computer
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If they dove air, there was no on site chamber required. Their argument was that with instructors and dive guides doing multiple dives a day it was far safer (at least as far as circumstances which an on site decompression chamber would mitigate), to do those dives on nitrox. In
their application for this variance they specifically discuss diving in the ocean. Dixie Divers operates inspected vessels.
From the variation application:
The applicant operates 12 diving
schools; five of the schools are operated
directly by the applicant and seven of
the schools are franchise operations.
The applicant employs 34 recreational
diving instructors, who are highly
skilled and experienced divers, to train
novice divers in recreational diving
knowledge and skills. The same 34
employees also serve as diving guides
and lead groups of sports divers to local
diving sites for recreational purposes.
(The recreational diving instructors and
diving guides are also referred to
hereafter as ‘‘employees’’ or, more
generally, as ‘‘divers.’’

As recreational diving instructors,
employees train recreational diving
students in conventional diving
procedures and the safe operation of
diving equipment. The diving students
may use an open-circuit, semi-closedcircuit,
or closed-circuit self-contained
underwater breathing apparatus
(SCUBA) with compressed-air or a highoxygen
breathing-gas mixture during
these training dives. The applicant’s
training program involves both
classroom instruction and practice dives
in which the employees accompany
diving students to ocean depths of zero
to 130 feet of sea water (fsw) for
durations that do not exceed established
no-decompression limits. During these
training dives, the diving instructors
provide underwater instruction in, and
allow the diving students to practice
using, diving procedures and
equipment. A diving instructor may
make as many as three to four training
dives a day while training diving
students either individually or in small
groups.
As diving guides, employees lead
small groups of trained sports divers to
local undersea diving locations for
recreaitonal purposes. The diving
locations are pre-selected by the diving
guide. The diving guide provides the
sports divers with information regarding
the diving site, including hazardous
conditions and safe practices. The
recreational diving groups consist of
sports divers who use open-circuit,
semi-closed-circuit, or closed-circuit
SCUBA with compressed-air or a highoxygen
breathing-gas mixture while
diving. In conducting these diving
excursions, the diving guide will dive
for periods that do not exceed
established no-decompression limits at
diving depths ranging from zero to 130
fsw. A diving guide may make as many
as five of these recreational diving
excursions a day.
So, if OSHA wasn't the authority responsible for this activity, why did they go through all of the trouble to approve, then codify the variance by issuing the final rule?