underwater visibility

См. также в других словарях:

• underwater visibility — povandeninis matomumas statusas T sritis radioelektronika atitikmenys: angl. underwater visibility vok. Unterwassersichtbarkeit, f rus. видимость под водой, f pranc. visibilité sous l eau, f …   Radioelektronikos terminų žodynas

• Underwater Port Security System — See UIS and IAS for other meanings of these initials. : For other diver detector sonars, see .UPSS stands for Underwater Port Security System, developed for the United States Coast Guard and the MSST (= Maritime Safety and Security Teams) as an… …   Wikipedia

• Underwater hockey — Two players competing for the puck at GB Student Nationals, Bangor Underwater hockey (UWH; also called Octopush and Water Hockey) is a global non contact sport in which two teams compete to maneuver a puck across the bottom of a swimming pool… …   Wikipedia

• Underwater searches — are procedures carried out by divers in order to find a known or suspected target object or objects in a specified search area under water. There are a number of techniques in general use by Commercial, Scientific, Public service, Military, and… …   Wikipedia

• Underwater archaeology — is the study of past human life, behaviours and cultures using the physical remains found in salt or fresh water or buried beneath water logged sedimentMuckelroy, K., Maritime archaeology. Cambridge University Press 1978. ISBN 0 521 29348 0] . It …   Wikipedia

• Underwater photography — is the process of taking photographs while under water. It is usually done while scuba diving, but can be done while snorkeling or swimming.OverviewUnderwater imaging is considered an especially challenging area of photography, since it requires… …   Wikipedia

• Underwater vision — Light rays bend when they enter from one medium to another of different density. The amount of bending is determined by the refractive indices of the two media. If one medium has a particular curved shape, it functions as a lens. The cornea,… …   Wikipedia

• Recreational diving — Divers off Key West, Florida Recreational diving or sport diving is a type of diving that uses SCUBA equipment for the purpose of leisure and enjoyment. In some diving circles, the term recreational diving is used in contradistinction to… …   Wikipedia

• List of diving hazards and precautions — Contents 1 Effects of relying on breathing equipment while underwater 2 Effects of barotrauma or pressure damage 2.1 …   Wikipedia

• Anti-frogman techniques — are security methods developed to protect watercraft, ports and installations, and other sensitive resources both in or nearby vulnerable waterways from potential threats or intrusions by frogmen or other divers.Risks and threats to be defended… …   Wikipedia

• Cave diving — is a type of technical diving in which specialized SCUBA equipment is used to enable the exploration of natural or artificial caves which are at least partially filled with water. It is an extension of the more common sport of caving, but is much …   Wikipedia