Control your body position to find neutral, horizontal trim
In the last article, we discussed the diver’s body is like a seesaw while the scuba equipment is similar to the kids playing on that piece of playground equipment. Many divers spend too much time adjusting their equipment, and not enough time working on their body position or form. A perfect equipment set-up will do nothing without solid form, but good form will allow a diver to compensate for all sorts of equipment issues.
It’s much easier to identify and adjust any issues with the equipment if the diver already has a good understanding of proper body positioning, so let’s start there.
Proper body positioning
It’s important to note the top half of the human body does not float (or sink) the same way as the bottom half.
The lungs are quite buoyant when we inhale and fill them with gas. They still contain some gas when we’ve exhaled completely, and are still more buoyant than regions of the body composed of mostly muscle and bone; both of which are negatively buoyant. As a result, a person with a lungful of air will tend to float in a torso-up / legs-down position.