A Decompression Stop is a period of time a diver must spend at a constant depth in shallow water at the end of a dive in order safely to eliminate inert gases from the diver's body to avoid decompression sickness. Decompression sickness, (DCS), divers disease, the bends, dysbarism, or caisson disease is the name given to a variety of symptoms suffered by a person exposed to a reduction in the pressure surrounding their body. ...

The diver uses decompression tables or dive computers to determine the stop depth and duration for a particular dive profile and breathing gas. Dive Tables, Decompression Tables or Tables are printed cards or booklets that allow divers to determine for a particular dive profile and breathing gas, the Decompression stops required for that dive in order to avoid decompression sickness. ... A dive computer or decompression meter is an electronic device used by a scuba diver to display information about the time and depth of a dive so that the diver can take measures to avoid decompression sickness. ... Jump to: navigation, search Air is the most common and only natural breathing gas. ...

A no stop dive is a dive that requires no decompression stops during the ascent.

There are maximum safe ascent rates even for "no stop" dives. Normally the ascent for shallowest 20 feet (6 metres) to the surface will be slowed to at least 1 minute. Typically with tables, the maximum ascent rate is 30 feet (10 metres) per minute when deeper than 20 feet (6 metres). Some dive computers have variable ascent rates, depending on depth.

During the stop, the "microbubbles" present after every dive leave the diver's body safely through the lungs. If they are not given enough time to leave safely or too many bubbles are created than can be eliminated naturally, the bubbles grow in size and number causing the symptoms and injuries of decompression sickness. Jump to: navigation, search The lungs flank the heart and great vessels in the chest cavity. ...

When diving with nitrogen based breathing gases, decompression stops are typically carried out in the 10 to 65 feet (3 to 20 metres) depth range. With helium based breathing gases, the stop depth is typically in the 65 to 130 feet (20 to 40 metres) range. Jump to: navigation, search General Name, Symbol, Number nitrogen, N, 7 Chemical series nonmetals Group, Period, Block 15, 2, p Appearance colorless Atomic mass 14. ... Jump to: navigation, search Air is the most common and only natural breathing gas. ... Jump to: navigation, search General Name, Symbol, Number helium, He, 2 Chemical series noble gases Group, Period, Block 18, 1, s Appearance colorless Atomic mass 4. ...

A "Pyle stop" is an additional short, deep water stop, which is increasingly used in deep diving. Typically, a Pyle stop is 2 minutes long and is carried out at the depth where the pressure change halves on an ascent from the bottom to a shallow water decompression stop. For example, on an ascent from a maximum depth of 196 feet (60 metres) at 100 psi (7 bar) to a decompression stop at 65 feet (20 metres) at 40 psi (3 bar), the Pyle stop would take place at the halfway pressure which is 70 psi (5 bar) at 130 feet (40 metres). The meaning of term deep diving depends on the level of the divers diver training, diving equipment, breathing gas and surface support: in recreational diving, 30 metres / 100 feet may be a deep dive in technical diving, 60 metres / 200 feet may be a deep dive in surface supplied...

A diver missing a decompression stop risks developing decompression sickness. The longer the stops missed, the greater the risk. The usual causes for missing stops are: not having enough breathing gas to complete the stops or accidentally losing control of buoyancy. An aim of most basic diver training is to prevent these two faults. There are less predictable causes of missing decompression stops. Diving suit failure in cold water forces the diver to choose between hypothermia and decompression sickness. Diver injury or marine animal attack also limit the duration of stops the diver is willing to carry out. Jump to: navigation, search Air is the most common and only natural breathing gas. ... Safe diving requires training. ... Two divers, one wearing a 1 atmosphere diving suit and the other standard diving dress, preparing to explore the wreck of the RMS Lusitania, 1935. ... Jump to: navigation, search Hypothermia is a medical condition in which the victims core body temperature has dropped to significantly below normal and normal metabolism begins to be impaired. ... Decompression sickness, (DCS), divers disease, the bends, dysbarism, or caisson disease is the name given to a variety of symptoms suffered by a person exposed to a reduction in the pressure surrounding their body. ...

There are several pieces of safety equipment used to help divers carry out decompression stops. A diving shot, a surface marker buoy or a decompression buoy can be used to mark the underwater positions and act as a buoyancy control aid in low visibility or currents. A decompression trapeze is useful for comfortably carrying out long stops. A diving shot is an item of diving equipment consisting of a weight, a line and a buoy. ... A Surface Marker Buoy, SMB or simply a blob is an inflatable buoy used by SCUBA divers, with a line, to mark the divers position to their surface, safety boat whilst the diver is underwater. ... A decompression buoy, deco buoy or delayed SMB is an item of diving equipment used by SCUBA divers to mark their position whilst underwater doing decompression stops. ... A decompression trapeze is a device used in recreational diving and technical diving to make decompression stops more comfortable and more secure and provide the divers surface cover with a visual reference for the divers position. ...

The length of "surface interval" between dives is also very important for decompression. It typically takes from 16 to 24 hours for the body to return to its normal, atmospheric, levels of inert gas saturation after a dive. The surface interval can be thought of as the final decompression stop of a dive.

Only divers breathing gas at high pressure, such as when using SCUBA, may need to do decompression stops. A diver who breathes gas at atmospheric pressure, such as in free-diving, snorkeling or when using an atmospheric diving suit, does not need to do decompression stops. However, it is possible to get Taravana from repetitive, deep free-diving with short surface intervals. Jump to: navigation, search Air is the most common and only natural breathing gas. ... Jump to: navigation, search Pressure (symbol: p) quantifies the intensity of a force acting on a surface in a direction perpendicular to that surface. ... SCUBA is an acronym for Self-Contained Underwater Breathing Apparatus. ... Freedive photographer Free-diving is an aquatic sport, considered an extreme sport, in which divers attempt to reach great depths unassisted by breathing apparatus. ... Jump to: navigation, search Snorkeling is the practice of swimming at the surface of a body of water equipped with a mask and a short tube called a snorkel. ... Two divers, one wearing a 1 atmosphere diving suit and the other standard diving dress, preparing to explore the wreck of the RMS Lusitania, 1935. ... Taravana is a disease among Polynesian island natives who habitually dive deep holding their breath many times in close succession, usually for food or pearls. ... Freedive photographer Free-diving is an aquatic sport, considered an extreme sport, in which divers attempt to reach great depths unassisted by breathing apparatus. ...