Walk down the ladder, turn around and place your hands on the sides of the top of the SUB. Take a deep breath, slide your hands down to the edge of the sides and enter the SUB head first.

Once in the SUB, you will take a few seconds to adjust. Things that will be unusual at first will be the noise of the air entering the bubble and the bubbling it makes around your neck. There is a bit of splashing, but it is not excessive. The bubbling is good because it gives you an indication that air is constantly entering the SUB.