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The Challenger Deep is the deepest known point of the seabed of Earth, with a depth of 10,902–10,929 m (35,768–35,856 ft) by direct measurement from deep-diving submersibles, remotely operated underwater vehicles and benthic landers, and (sometimes) slightly more by sonar bathymetry.
Sonar is a technique that uses sound propagation to navigate, measure distances (ranging), communicate with or detect objects on or under the surface of the water, such as other vessels.
A diving support vessel is a ship that is used as a floating base for professional diving projects. Basic requirements are the ability to keep station accurately and reliably throughout a diving operation, often in close proximity to drilling or production platforms, for positioning to degrade slowly enough in deteriorating conditions to recover divers without excessive risk, and to carry the necessary support equipment for the mode of diving to be used.
An autonomous underwater vehicle (AUV) is a robot that travels underwater without requiring continuous input from an operator. AUVs constitute part of a larger group of undersea systems known as unmanned underwater vehicles, a classification that includes non-autonomous remotely operated underwater vehicles (ROVs) – controlled and powered from the surface by an operator/pilot via an umbilical or using remote control. In military applications an AUV is more often referred to as an unmanned undersea vehicle (UUV). Underwater gliders are a subclass of AUVs.
A towed array sonar is a system of hydrophones towed behind a submarine or a surface ship on a cable. Trailing the hydrophones behind the vessel, on a cable that can be kilometers long, keeps the array's sensors away from the ship's own noise sources, greatly improving its signal-to-noise ratio, and hence the effectiveness of detecting and tracking faint contacts, such as quiet, low noise-emitting submarine threats, or seismic signals.
The Monterey Bay Aquarium Research Institute (MBARI) is a private, non-profit oceanographic research center in Moss Landing, California. MBARI was founded in 1987 by David Packard, and is primarily funded by the David and Lucile Packard Foundation. Christopher Scholin serves as the institute's president and chief executive officer, managing a work force of approximately 220 scientists, engineers, and operations and administrative staff.
Marine salvage is the process of recovering a ship and its cargo after a shipwreck or other maritime casualty. Salvage may encompass towing, lifting a vessel, or effecting repairs to a ship. Protecting the coastal environment from oil spillages or other contaminants from a modern ship can also be a motivator, as oil, cargo, and other pollutants can easily leak from a wreck.
Unmanned underwater vehicles (UUV), sometimes known as underwater drones, are submersible vehicles that can operate underwater without a human occupant. These vehicles may be divided into two categories: remotely operated underwater vehicles (ROUVs) and autonomous underwater vehicles (AUVs). ROUVs are remotely controlled by a human operator. AUVs are automated and operate independently of direct human input.
Subsea technology involves fully submerged ocean equipment, operations, or applications, especially when some distance offshore, in deep ocean waters, or on the seabed. The term subsea is frequently used in connection with oceanography, marine or ocean engineering, ocean exploration, remotely operated vehicle (ROVs) autonomous underwater vehicles (AUVs), submarine communications or power cables, seafloor mineral mining, oil and gas, and offshore wind power.
Intervention AUV or I-AUV is a type of autonomous underwater vehicle. Its characteristic feature is that it is capable of autonomous interventions on the subsea installations, a task usually carried out by remotely operated underwater vehicles (ROVs) or human divers.
Avenger-class mine countermeasures ships are a class of 14 ships constructed for the United States Navy from 1987 to 1994, designed to clear mines from vital waterways. The ships have the hull designator MCM.
An underwater acoustic positioning system is a system for the tracking and navigation of underwater vehicles or divers by means of acoustic distance and/or direction measurements, and subsequent position triangulation. Underwater acoustic positioning systems are commonly used in a wide variety of underwater work, including oil and gas exploration, ocean sciences, salvage operations, marine archaeology, law enforcement and military activities.
A short baseline (SBL) acoustic positioning system is one of three broad classes of underwater acoustic positioning systems that are used to track underwater vehicles and divers. The other two classes are ultra short baseline systems (USBL) and long baseline systems (LBL). Like USBL systems, SBL systems do not require any seafloor mounted transponders or equipment and are thus suitable for tracking underwater targets from boats or ships that are either anchored or under way. However, unlike USBL systems, which offer a fixed accuracy, SBL positioning accuracy improves with transducer spacing. Thus, where space permits, such as when operating from larger vessels or a dock, the SBL system can achieve a precision and position robustness that is similar to that of sea floor mounted LBL systems, making the system suitable for high-accuracy survey work. When operating from a smaller vessel where transducer spacing is limited, the SBL system will exhibit reduced precision.
Underwater searches are procedures to find a known or suspected target object or objects in a specified search area under water. They may be carried out underwater by divers, manned submersibles, remotely operated underwater vehicles, or autonomous underwater vehicles, or from the surface by other agents, including surface vessels, aircraft and cadaver dogs.
The Mini Rover ROV was the world's first small, low cost remotely operated underwater vehicle (ROV) when it was introduced in early 1983. After a demonstration to industry professionals, in the Spring of 1984, it made a significant entry to the remotely operated vehicle market. It is a self-propelled, tethered, free swimming vehicle that was designed and built by Chris Nicholson of Deep Sea Systems International, Inc. (DSSI). The Mini Rover ROV entered the ROV market at a price of $26,850 when the next lowest cost ROV was $100,000. Nicholson built the first Mini Rover ROV in his garage in Falmouth, MA. It was 26 inches long and weighed 55 pounds. It could be carried on airplanes as luggage.
The REMUS series are autonomous underwater vehicles (AUVs) made by the Woods Hole Oceanographic Institution and designed by their Oceanographic Systems Lab (OSL). More recently REMUS vehicles have been manufactured by the spinoff company Hydroid Inc, which was a wholly owned subsidiary of Kongsberg Maritime. Hydroid was acquired by Huntington Ingalls Industries (HHI) in March 2020. The series are designed to be low cost, they have shared control software and electronic subsystems and can be operated from a laptop computer. They are used by civilians for seafloor mapping, underwater surveying, and search and recovery as well as by several navies for mine countermeasures missions.
The SeaFox is an anti-mine Unmanned underwater vehicle (UUV) manufactured by German company Atlas Elektronik to locate and destroy ground and moored mines. There are three versions including a training version. The orange SeaFox-I "inspection" variant has sonar and an Inertial navigation system, and the black SeaFox-C "combat" round also has a 1.4 kilograms (3.1 lb) shaped charge warhead. The system is in service with eleven navies. The SeaFox is an advanced design of an Expendable Mine Disposal Vehicle or EMDV. It has a low life cycle cost as it has low running and replacement costs. Its main targets are sea mines that pose a danger to vessels. It communicates with the ship via a fiber-optic cable that connects to a screen for the operator to view the mine. The SeaFox uses a custom launch and retrieval system that may be fitted to a variety of ships, boats or even helicopters. It can be used for a range of tasks such as conduct damage estimation, route surveys, maritime boundary control, intelligence and harbor surveillance missions.
RV Falkor is an oceanographic research vessel operated by the Schmidt Ocean Institute. Ship time aboard the vessel is made freely available to researchers once they have undergone an application, peer review process, and their proposal has been accepted. One condition for using the Falkor is that research findings and data from all expeditions are made publicly available. Researchers aboard Falkor receive expert shipboard support, use of scientific equipment, as well as robotic and computational resources. RV Falkor is adaptable and can facilitate new technologies and external resources as required for each science expedition. Falkor’s current status and a virtual ship tour are publicly available on the Schmidt Ocean Institute website. The Schmidt Ocean Institute announced the change of ownership of the vessel on 14. March 2022. It was renamed to Gaia Blu and is used by the italian National Research Council. It concluded its first science expedition at the 20. October 2022.
An underwater survey is a survey performed in an underwater environment or conducted remotely on an underwater object or region. Survey can have several meanings. The word originates in Medieval Latin with meanings of looking over and detailed study of a subject. One meaning is the accurate measurement of a geographical region, usually with the intention of plotting the positions of features as a scale map of the region. This meaning is often used in scientific contexts, and also in civil engineering and mineral extraction. Another meaning, often used in a civil, structural, or marine engineering context, is the inspection of a structure or vessel to compare actual condition with the specified nominal condition, usually with the purpose of reporting on the actual condition and compliance with, or deviations from, the nominal condition, for quality control, damage assessment, valuation, insurance, maintenance, and similar purposes. In other contexts it can mean inspection of a region to establish presence and distribution of specified content, such as living organisms, either to establish a baseline, or to compare with a baseline.
Underwater exploration is the exploration of any underwater environment, either by direct observation by the explorer, or by remote observation and measurement under the direction of the investigators. Systematic, targeted exploration is the most effective method to increase understanding of the ocean and other underwater regions, so they can be effectively managed, conserved, regulated, and their resources discovered, accessed, and used. Less than 10% of the ocean has been mapped in any detail, less has been visually observed, and the total diversity of life and distribution of populations is similarly obscure.
References
- ↑ "Blueview Technologies, Inc - Seattle Washington (WA)". Manta. Retrieved 2009-06-11.
- ↑ "BlueView Launches Dual Frequency Sonar System; BlueView's DF900-2250 Combines 900 kHz and 2.25 MHz Multibeam Imaging Sonar". ThomasNet. 11 June 2009. Archived from the original on 2008-08-21. Retrieved 17 July 2009.
- ↑ Teledyne will acquire BlueView Technologies
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