What is a Jon Line?
A jon line is a specialized piece of equipment used by scuba divers to maintain a stable position underwater, particularly during decompression stops in strong currents. It is essentially a length of cord or webbing, typically around 1.5 to 2 meters (4.9 to 6.6 feet) long, equipped with a clip or carabiner at one end and sometimes a handle or loop at the other. The term “jon line” is derived from its creator, Jon Hulburt, a diver who saw the need for such a tool to aid divers in holding their position without expending excessive energy. In technical and recreational diving, the jon line has become a crucial tool for ensuring safety and reducing physical exertion during prolonged stops.