The vibe is sleek, subtle, and high end. This isn't your every man's dive club. But it should be so cool, every man would want to be a member.
The subtlety should be in the abstract/symbol/depiction of "DYP" (see EF Everday Fit logo above) OR a clever graphic of water/SCUBA (if you're inspired in another direction). At first glance, you don't see it, but then it soaks in. Perhaps the use of negative space in the logo. Perhaps you have a better idea. The graphic should be able to stand on it's own, embroidered on the front of a hat, embossed on pelican case. "Dive Your Planet" should fit thematically with it, but can be used on it's own as well.
First choice is that "DYP" is the logo. If inspiration hits and you want to pitch otherwise, that's ok too. DYP is a play on the word "dip". Another slogan for DYP is "Go for a dip." The slogan isn't part of the logo at this point. Just DYP - Dive Your Planet.
The website is http://www.DiveYourPla.net. Perhaps incorporate the "dot" before "net" in the text logo. But don't let the "dot" break up the words. It's subtle, but it's there. Something to realize after the fact. "Oh, that's the url too!"
Feel free to ask questions.