Hi Shawn, yes. I believe there is some training online necessary. The biggest difference would be dealing with decompression, 35 feet deep barely makes the dive tables. Although know someone who dove at 20 feet maybe 5 hours then drove over Donner Summit (about 8,000' think) and did get bends, so altitude has to be taken into account.
I know of an explosives company that has a very small explosive charges that has an ATF exemption, no explosives license is required, just passing an online test. It can blow up big boulders it is just that handling the charges is very safe so why no license required, in fact here is a video of it being used www.SierraBlaster.com .
Think for Nomad the concept is the same. Some training is required, just a lot less than necessary to dive 100 feet deep on tanks. Having done a great deal of hookah diving under 35 feet and know a lot of others who have done the same for decades and only know of two problems. The high altitude incident mentioned above (he survived just fine) and a very sad case a boulder rolled on foot of gold diver and in efforts to free him the hose was broken and he died. Had nothing to do training, the solution would be to have had a backup air source. Which for gold divers when they are dredging with motor on air could be a Nomad or pony tank.
