Back Kick
An advanced finning technique that propels a diver backward without using the hands, ideal for backing off a reef, a subject, or a teammate.
The back kick moves you backward through the water without turning around and without sculling with your hands. From a horizontal, frog-kick-ready position, you sweep the fins forward, blades angled to catch water, then feather them flat for the recovery so they slip back without cancelling the thrust. The propulsion is modest, a body length or two per cycle, but it is precise, and precision is the entire point: it lets you reverse out of a position you should not have finned into.
Its uses are constant once you have it. Photographers back away from a subject without a cloud of fin wash, divers drift back from a fragile coral head or a wall instead of touching it, teammates open space in a crowded group at a safety stop, and anyone can hold station against slight forward momentum while reading a gauge or shooting a DSMB. In overhead environments like wrecks and caves, backing out of a restriction the way you came in is sometimes the only option, which is why cave and technical training treats the back kick as mandatory.
It is famously the hardest kick to learn, most divers go backward in their heads long before they go backward in the water. Stiff paddle fins, flat trim, and slow, exaggerated practice with a reference line below help. Filming yourself is the fastest feedback loop, and most divers should expect a few sessions of comic, forward-drifting attempts before the feathered recovery clicks and the first genuine backward glide arrives.