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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).
The most common forms of underwater search patterns are: Circular search; 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 ...
Several standardised search patterns are in common use, some of which are more suitable for surface vessels, and others are more suitable for aircraft. Similar search patterns are used for underwater searches. Most water surface search patterns are followed relative to a moving datum, so steering is by compass heading and distance is determined ...
Pages in category "Search patterns" ... Underwater searches; W. Water surface searches This page was last edited on 23 January 2024, at 09:00 (UTC ...
In all cases the search pattern should completely cover the search area without excessive redundancy or missed areas. Overlap is needed to compensate for inaccuracy and sensor error, and may be necessary to avoid gaps in some patterns. Diver searches: Circular search; Pendulum search; Jackstay searches. Snag-line search; Compass searches ...
search pattern. See: Underwater searches. Systematic procedure for covering the search area sufficiently to be reasonably sure of finding a given target if it is there. Several patterns are in general use for underwater searches, depending on the target, the terrain, and available facilities. secondary drowning. Main article: Secondary drowning
Underwater searches are procedures to find a known or suspected target object or objects in a specified search area under water. A search method attempts to provide full coverage of the search area, by using a search pattern, which should completely cover the search area without excessive redundancy or missed areas. [20] [21] [22]
Nav finder and underwater compass – basic underwater navigation tools Suunto SK-7 diving compass in aftermarket wrist mount with bungee straps. Diver navigation, termed "underwater navigation" by scuba divers, [1] is a set of techniques—including observing natural features, the use of a compass, and surface observations—that divers use to navigate underwater.