Scuba Gear
Scuba gear is more than just your air tank and supply line. It includes things like your goggles, your wetsuit, your flippers, and technical equipment necessary for surviving underwater. It also includes any equipment used to conduct work or to play while underwater.
Some scuba gear, such as scuba fins or an underwater camera is non-essential. You will not die underwater without a camera. While you may find movement more difficult without fins on your feet, it again is a non life-threatening impediment. These non critical pieces of equipment are certain to make your life easier, but they are not necessary to attempt a dive.
Other pieces of scuba gear are absolutely essential. For instance going down without an air supply is a quick recipe for death. But the air supply is not the only thing you need. You need a proper delivery system that will give you the air at the right pressure for your body. You also need an air monitoring gauge to let you know how much air you have left. Wetsuits protect the body while underwater as well as helping you maintain a steady body temperature. Always check your gear to ensure that it is in good condition, the bottom of the ocean is no place to discover an equipment malfunction.