Diving support equipment

thumb|A small stationary high pressure breathing air compressor for filling scuba cylinders thumb|A powerful compressor for street work. Model XASS from Atlas Copco circa 1985. thumb|right|Natural gas compressor at a gas well thumb|right|High pressure reciprocating compressor from Belliss and Morcom, used in the bottling industry A compressor is a mechanical device that increases the pressure of a gas by reducing its volume. An air compressor is a specific type of gas compressor.

pressure vessel for human occupation

gas filled chamber for transporting divers vertically through the water

thumb|right|280 px|An airlock on board Space Shuttle Atlantis

technology that allows survival in hostile environments

devicecompresor

opening in the base of a boat hull, platform, or chamber, giving access to the water below

thumb|Hopcalite Hopcalite is the trade name for a number of mixtures that mainly consist of oxides of copper and manganese, which are used as catalysts for the conversion of carbon monoxide to carbon dioxide when exposed to the oxygen in the air at room temperature.

instrument which measures very small variations in the Earth's magnetic field

Machine to increase pressure of a fluid