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.
The Naval Undersea Warfare Center (NUWC) is the United States Navy's full-spectrum research, development, test and evaluation, engineering and fleet support center for submarines, autonomous underwater systems, and offensive and defensive weapons systems associated with undersea warfare. It is one of the corporate laboratories of the Naval Sea Systems Command. NUWC is headquartered in Newport, Rhode Island and has two major subordinate activities: Division Newport and Division Keyport in Keyport, Washington. NUWC also controls the Fox Island facility and Gould Island. It employs more than 4,400 civilian and military personnel, with budgets over $1 billion.
A midget submarine is any submarine under 150 tons, typically operated by a crew of one or two but sometimes up to six or nine, with little or no on-board living accommodation. They normally work with mother ships, from which they are launched and recovered and which provide living accommodation for the crew and support staff.
HMCS Yukon was a Mackenzie-class destroyer that served in the Royal Canadian Navy (RCN) and later the Canadian Forces. She was the first Canadian naval unit to carry the name. She was named for the Yukon River that runs from British Columbia through Yukon and into Alaska in the United States.
A sonobuoy is a relatively small buoy – typically 13 cm (5 in) diameter and 91 cm (3 ft) long – expendable sonar system that is dropped/ejected from aircraft or ships conducting anti-submarine warfare or underwater acoustic research.
The Brahmaputra-class frigates are guided-missile frigates of the Indian Navy, designed and built in India. They are an enhancement of the Godavari class, with a displacement of 3850 tons and a length of 126 metres (413 ft). Although of similar hull and dimension, internally, the Brahmaputra and Godavari classes have different configurations, armaments and capabilities. 3 ships of this class serve in the Indian Navy.
Anti-submarine warfare is a branch of underwater warfare that uses surface warships, aircraft, submarines, or other platforms, to find, track, and deter, damage, or destroy enemy submarines. Such operations are typically carried out to protect friendly shipping and coastal facilities from submarine attacks and to overcome blockades.
Aviation electronics technician (AT) is a US Navy enlisted rating or job specialty. At the paygrade of E-9, ATs merge with the aviation electrician's mate (AE) rating to become avionics technicians (AV). There has been talk of completely merging the two ratings, but as yet no definite plans have been announced. Aviation electronics technicians wear the specialty mark of a winged helium atom.
USS Carpenter (DD/DDK/DDE-825) was a Gearing-class destroyer of the United States Navy, named for Lieutenant Commander Donald M. Carpenter (1894–1940).
Naval Aircrewman (AW)is an enlisted rating of the U.S. Navy. It was previously designated as Aviation Warfare Systems Operator. However, under the CNO-directed "Helicopter Master Plan", all 78XX and 94XX Aircrewman were re-designated as "Naval Aircrewman”. The description of the Aviation Warfare Operator Rate (AW) on this page define only the "Active Duty" aspects of the AW rate, fleets (aircraft), positions, and duties that are manned by aircrew in today's Navy. The Full Time Support (FTS) and Selected Reserves (SELRES) components of the U.S. Naval Reserves make up the largest number of Aircrew in today's Navy. Many technologically advanced navies have a similar trade.
Mineman is a United States Navy occupational rating.
Operations Specialist is a United States Navy and United States Coast Guard occupational rating. It is a sea duty-intensive rating in the Navy while most of Coast Guard OS's are at ashore Command Centers.
Torpedoman's Mate is a United States Navy occupational rating. It was disestablished on submarines in 1995 and on surface ships on 1 October 2007. Surface torpedomen were merged into the gunner's mate rating, while submarine torpedomen were merged into the machinist's mate (non-nuclear) rating, becoming MM(W) or machinist mates (weapons). It was re-established on 30 September 2019 via NAVADMIN 225/19. The TM rating badge will be the same one in use when the rating was disestablished in 1995.
Geophysical MASINT is a branch of Measurement and Signature Intelligence (MASINT) that involves phenomena transmitted through the earth and manmade structures including emitted or reflected sounds, pressure waves, vibrations, and magnetic field or ionosphere disturbances.
The United States Navy job rating of electronics technician (ET) is a designation given by the Bureau of Naval Personnel (BUPERS) to enlisted members who satisfactorily complete initial Electronics Technician "A" school training.
INS Kadmatt (P29) is the second of four anti-submarine warfare corvettes built for the Indian Navy by the Garden Reach Shipbuilders and Engineers of Kolkata under Project 28. She was inducted into the Eastern Naval Command of the Indian Navy.
The Durjoy class is a class of large patrol craft of the Bangladesh Navy. A total of four are serving the Bangladesh Navy as of 2021.
Helicopter Maritime Strike Squadron 49 (HSM-49) is a United States Navy Maritime Strike helicopter squadron based Naval Air Station North Island, California.
