Acoustic location systems to detect divers and submerged swimmer delivery vehicles
This article is written like a personal reflection, personal essay, or argumentative essay that states a Wikipedia editor's personal feelings or presents an original argument about a topic. Please help improve it by rewriting it in an encyclopedic style.(July 2008) (Learn how and when to remove this message)
Diver detection sonar (DDS) systems are sonar and acoustic location systems employed underwater for the detection of divers and submerged swimmer delivery vehicles (SDVs). The purpose of this type of sonar system is to provide detection, tracking and classification information on underwater threats that could endanger property and lives. Further, this information is useful only to the extent that it is made available to authorities in time to make possible the desired response to the threat, be it deterrent or defensive action. Subsurface threats are a difficult problem, because reliable detection is available to date chiefly by use of high-resolution active sonar or trained dolphins or sea lions.[1]
The threat of an underwater terrorist attack is a concern to the maritime industry and port law enforcement agencies. Ports face a range of threats from swimmers, boat-delivered ordnance such as limpet mines and other forms of improvised underwater explosive devices.[2]
DDS systems have been developed to provide underwater security for ports, coastal facilities, offshore installations, pipelines and ships. Due to the variety of life and objects that exist under the water, it is desirable that a DDS system be capable of distinguishing between large sea mammals, shoals of fish; a ship's wake; a diver with an open circuit scuba set and a stealth diver with a rebreather.
DDS systems have been developed that can be mounted on the seabed, on a pier or on the hull of a vessel. For complete port security these systems are integrated with the surface surveillance and security systems employed at ports, coastal facilities and offshore installations. Various systems provide specialized features to facilitate their use in port security systems including automatic detection features.
^TECHNICAL DOCUMENT 3138 May 2002, Non-Lethal Swimmer Neutralization Study Archived 27 April 2006 at the Wayback Machine. Applied Research Laboratories, The University of Texas at Austin.
^day 1/underwater%20terrorism prevention plan/underwater-terrorism-prevention-plan-flyer.doc Underwater Terrorism Prevention Plan Informational Bulletin[permanent dead link]
and 25 Related for: Diver detection sonar information
Diverdetectionsonar (DDS) systems are sonar and acoustic location systems employed underwater for the detection of divers and submerged swimmer delivery...
specialized diver-detector sonars.[citation needed] Examples of diver-detecting active sonar systems are: Sonardyne SENTINEL diverdetectionsonar[citation...
balance of a diver occurs when the total heat exchanged between the diver and their surroundings results in a stable temperature of the diver. Ideally this...
Tata Power SED (Tata Power Strategic Engineering Division) is an Indian defence manufacturing company and a part of the Tata Group. It was a unit of Tata...
mistakenly opened the clamp that was keeping the trunk sealed before Hellevik (diver 4) had closed the door to the chamber. This resulted in both chambers being...
able to auto track a vessel as small as 5 meters in length. The DiverDetectionSonar is a network of underwater sensors developed by the Naval Physical...
water. Underwater video lights can serve the same purpose. Hand-held sonar for a diver can provide a synthetic view using ultrasonic signals emitted and...
for safer decompression. Various surface detection aids may be carried to help surface personnel spot the diver after ascent. In addition to the surface...
is another imaging sonar for use by a diver. Integrated navigation sonar system (INSS) is a small flashlight-shaped handheld sonar for divers that displays...
Finland: Diver Mikko Paasi came to assist with rescue efforts. France: Diver Maksym Polejaka assisted with the rescue efforts. Ireland: Diver Jim Warny...
Such personnel are also known by the more formal names of combat diver, combatant diver, or combat swimmer. The word frogman first arose in the stage name...
needed] SAES has developed an active diverdetectionsonar DDS-03 that has been specifically designed for the detection of underwater threats such as divers...
and TEU containers. The ship will be protected by the ARAS-2023 diverdetectionsonar (DDS). It will have a crew of 261 personnel: 30 officers, 49 NCOs...
divers to avoid detection, scientific divers to avoid disturbing marine animals, and media divers to avoid bubble interference. A scuba diver moves underwater...
days to weeks, having them remain under pressure for the whole period. A diver breathing pressurized gas accumulates dissolved inert gas used in the breathing...
Pavilion...." Geyer, Thomas (23 November 2003). "Diver remembers day her scuba buddy died in Baja". Cyber Diver News Network. Archived from the original on...
A diver down flag, or scuba flag, is a flag used on the water to indicate that there is a diver below. Two styles of flag are in use. Internationally...
Richard William Stanton, MBE, GM (born 1961) is a British civilian cave diver who specialises in rescues through the Cave Rescue Organisation and the...
members of the OSS, established the first military special operations combat diver units nearly a decade before the SEALs were created in 1962. Some of the...
is needed to achieve diver neutral buoyancy in freshwater dives. Water temperature, visibility and movement also affect the diver and the dive plan. Diving...