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Standard circular search pattern Circular search pattern modified to avoid twisting or fouling an umbilical or lifeline Pendulum search pattern along a wall. An underwater circular search is a procedure conducted by a diver moving around a fixed reference point, usually by swimming, at a series of distances (radii).
A moveable jackstay may spanned between fixed jackstays to guide the divers along each sweep of the search pattern, then moved by a specified distance along the fixed jackstays by the divers in preparation for the next sweep. In a snagline search, jackstays may be used to ensure that the divers cover the correct area. [5] [6]
Jackstay search; Expanding square search; Ladder pattern search; The patterns are usually performed by divers in pairs or teams below the water, but they can also be conducted by use of a tender who may be a snorkeller at the surface, a person on a towing boat, or a person located on the shore. [citation needed]
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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.
Bomb-making materials linked to the New Year's Day attack in New Orleans were recovered by FBI agents and local law enforcement Thursday at the suspect's residence in Houston, Texas, sources ...
Pendulum searches – a variation on the circular search where the diver stops and changes direction at the end of each arc. [30] Jackstay search – divers swim along a search line – the jackstay, while searching to the sides. There are various techniques for performing a jackstay search. [30] Compass searches – search patterns controlled ...
jackstay. See: Jackstay#Diving jackstay. A line secured at both ends to serve as a support [39] or guide. [40] jackstay search. See:Underwater searches#Jackstay search. Underwater search techniques using one or more jackstays to guide the searcher. [40] jack-up rig. Main article: Jackup rig