Greetings: The number you posted on does not even come close to including commercial divers. Commercial divers don't go through a SCUBA training agency for gas training like IANTD, TDI etc. Commercial divers will be trained in house by whatever company they are working for (Oceaneering Int. etc.). Since you get paid by the depth (the deeper you go the more you get paid) the most experienced divers will get to do the gas diving. In most cases it will take someone breaking into the commercial field a good 4 years before they will being diving gas. Commercial companies also do not give you a little card for certification, you learn it and do it. Tom -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
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