While your out there looking for a diving career I would suggest you steer clear of commercial diving. I had been a commercial diver in Louisiana for nearly 10 years. Granted the pay was much better than what you could expect if your instrucing or guiding people on recreational dives, but in comparision for amount of time away from family and friends, the danger and generally hazardous life style it is not enough. Also, down south if your name isn't Thibeadaux or Boudro don't expect to advance very fast in a commercial diving occupation. Occassionally I had dives where the visibility was more than a couple of feet. But not often. Unless you want to loose the magic that first infects you when you first start diving stay away from oilfield or construction diving.