Sidemount- Principles For Success May 2026

Take these principles to your next pool session. Not a deep dive. Just a pool. Strip down to the Ghost Diver. Pass that test. Then add one cylinder. Adjust the Leaning "L." Clip and unclip until your hands bleed (figuratively). Then add the second cylinder. Simulate a valve shutdown fifty times.

This article deconstructs the sidemount configuration into seven core principles. Whether you are rigging your first set of AL80s or trimming out steel LP85s for a 6-hour cave dive, these laws apply. The single biggest mistake new sidemount divers make is trying to solve buoyancy and trim problems with the tanks . They think, "If I move the tank up, I will sink my feet." Or, "If I slide it back, my chest will go down." Sidemount- Principles For Success

Think of the "Ghost Diver"—your body, backplate (if any), wing, and exposure suit. When you remove the cylinders, you should be able to hover in horizontal trim, motionless, with your hands at your sides or crossed on your chest. You should require zero fin movement to maintain depth. Take these principles to your next pool session

Success Principle: Trim is a property of the diver, not the tanks. Recreational backplate divers love their continuous webbing—one piece, no padding, minimalist. In sidemount, you cannot simply thread the same rigid straps sideways. The human torso is conical, and your shoulder blades move. A poorly fitted sidemount harness will rotate tanks into your armpits, pinch your neck, and cause lower back pain. Strip down to the Ghost Diver

If you clip a cylinder to your chest D-ring and bottom clip, but the tank's center of buoyancy is behind your center of gravity, you will roll onto your back (feet up, face to the sky). If it is too far forward, you will pitch head-down.