Serious Diving. Serious Fun. In 1998, SSI adopted the slogan "serious diving. serious fun." for a multi-faceted marketing program. We loved the slogan because it summed up our attitude about the sport of scuba diving. SSI's mission is to get people excited about diving as a lifetime of adventure. The key to a lifetime of diving is that people must have fun diving or they will choose to do something else. Our belief is that proper training has a lot to do with fun. We learned long ago that when it comes to diving, Ability + Comfort = FUN! This is why we take training so seriously; because we take our fun so seriously. And that is why SSI Divers have such a longstanding reputation for being confident, competent, comfortable, outstanding divers--and they have the most fun too!