thumb|right|Surface-supplied diver at the [[Monterey Bay Aquarium, Monterey, California]]

[[File:US Navy 051026-N-0000X-001 Electronics Technician 1st Class Matthew Ammons, a diver assigned to Mobile Diving and Salvage Unit Two (MDSU-2), is fitted with a Kirby Morgan 37 Dive Helmet.jpg|thumb|right|US Navy Diver using Kirby Morgan Superlight 37 diving helmet

In addition to the standard system of surface-supplied diving using a diver's umbilical and diving helmet or full-face diving mask to provide the diver with compressed atmospheric air from a low-pressure diving compressor, there are other configurations in use for surface oriented diving:

Technically, atmospheric suit diving, scuba diving and freediving are also "surface oriented", but are not "surface-supplied".

Scuba replacement

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Scuba replacement is a surface-supplied diving mode where both the primary and reserve breathing gas supplies are from high-pressure storage cylinders. The rest of the system is identical to the standard surface supply configuration, and the full umbilical system, bailout cylinder, communications and surface gas panel are used. This is more portable than most compressors and is used by commercial diving contractors as a substitute for scuba with most of the advantages and disadvantages of a regular compressor fed surface air supply. Scuba replacement equipment is used where compact, portable surface supplied equipment is needed for rapid deployment by small craft or road vehicle. It is also used where the ambient air is contaminated and unsuitable for use as a breathing gas when compressed, such as some situations in hazmat diving.

The compressor should be provided with an accumulator and a relief valve. The accumulator functions as an additional water trap, but the main purpose is to provide a reserve volume of pressurised air. The relief valve allows any excess air to be released back to the atmosphere while retaining the appropriate supply pressure in the accumulator.

Hookah:

  • Introduction to hooka diving

Compressor diving

  • Photographs of Pa-aling compressor diving in the Philippines
  • BBC documentary features ‘dangerous’ fishing method in the Philippines
  • BBC One - Human Planet, Oceans - Into the blue. Pa-aling divers (with link to video)

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