Kenny13
Contributor
When we go this far away we always take a spare regulator for the group. If I were renting, I'd rent a spare regulator to be shared between you and your son. Oh, what I really hate is getting to the dive spot and having a "short fill" - I own a pressure gauge (but also you could pretest pressure with your reg). I test the pressure in each tank before I leave the dive shop parking lot. I didn't do this about 6 months ago after a hydro, and they had forgot to top it off. BUT, we own at least 10 tanks so we don't get stuck without a backup and sometimes supply my buddies with a working reg, full tank, weight belt, a clip on 2-4 lb lead, goodybag, fin/strap. Having your own stuff is great and we don't call dives because of junky equipment or somebody had forgotten something.
Yeah, I really wish I had thought about renting a spare regulator for him. Absolutely will do so next time around. As far as checking tank pressure, they have a gauge at the shop and check each tank right in front of you before they let you take them so that's not a problem. Of course, if we're diving nitrox we'll get the pressure when we analyze the tanks before logging them.