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There is an ongoing debate to determine whether or not underwater logging is a sustainable practice and if it is more environmentally sustainable than traditional logging. Underwater logging has been introduced in select locations around the world, including Ghana's Lake Volta, [1] the largest reservoir by surface area in the world. A related ...
Logging is the beginning of a supply chain that provides raw material for many products societies worldwide use for housing, construction, energy, and consumer paper products. Logging systems are also used to manage forests, reduce the risk of wildfires, and restore ecosystem functions, [2] though their efficiency for these purposes has been ...
Public safety divers' occupation and job description is based on underwater search and recovery, and they may learn more techniques than other professional divers. Search and recovery is a class of underwater work, and is out of scope for general recreational diving. Nevertheless, many recreational divers choose to learn the skills and have ...
US Navy diver dredging an excavation site during an underwater recovery operation, searching for personnel who went missing during WWII off the coast of Koror. Salvage diving is the diving work associated with the recovery of all or part of ships, their cargoes, aircraft, and other vehicles and structures which have sunk or fallen into water.
Archaeological diving is a type of scientific diving used as a method of survey and excavation in underwater archaeology.The first known use of the method comes from 1446, when Leon Battista Alberti explored and attempted to lift the ships of Emperor Caligula in Lake Nemi, Italy. [1]
Techniques for direct measurement also vary, from the use of calibrated distance lines or surveyor's tape measures, to a mechanism like an impeller log, to pacing off the distance along the bottom with the arms. [2] Use of a guide line or jackstay. A guide line may be laid to facilitate navigation to and from the underwater workplace. This ...
Water surface searches are procedures carried out on or over the surface of a body of water with the purpose of finding lost vessels, persons, or floating objects, which may use one or more of a variety of search patterns depending on the target of the search, as the direction and rate of drift vary depending on the characteristics of the target and the water and weather conditions at the time.
A silt out or silt-out is a situation when underwater visibility is rapidly reduced to functional zero by disturbing fine particulate deposits on the bottom or other solid surfaces. This can happen in scuba and surface supplied diving , or in ROV and submersible operations, and is a more serious hazard for scuba diving in penetration situations ...