For currents, people usually say never to swim against them, but rather in a direction that's perpendicular to the current. Swimming against it will only get you tired and will use your air much faster.
About your goggles, I don't toothpaste will be too abrasive for them. Go for it.
A good thing to practice if you have access to a pool in which you can submerge yourself easily is putting your mask on underwater, or clearing out water that you intentionally let him. Sometimes if you're not careful, or your partner isn't careful, a fin, or something else, could knock your mask partly off, and you need to be able to refill it with air without panicking because your vision is suddenly impaired in a possibly dangerous environment.
Don't worry though, as any good instructor will probably practice this with you in the bottom of a pool.
I wouldn't worry, Crompsin. You're a soldier, which means you've had your life depend on your partners and gear. I'm sure you will study every aspect of your BCD, your diving suit, and maybe even customize them to your liking one day. Underwater Camo, maybe, with special holsters for diving tools.
Most importantly, though, enjoy your time underwater, it's truly amazing to dive.
Last edited by biznatch; 07-18-2009 at 11:09 PM..
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