A Small Waterplane Area Twin Hull, better known by the acronym SWATH, is a twin-hull ship design that minimizes hull cross section area at the sea's surface. Minimizing the ship's volume near the surface area of the sea, where wave energy is located, maximizes a vessel's stability, even in high seas and at high speeds. The bulk of the displacement necessary to keep the ship afloat is located beneath the waves, where it is less affected by wave action. Wave excitation drops exponentially as depth increases, so wave action normally does not affect a submerged submarine at all. Placing the majority of a ship's displacement under the waves is similar in concept to creating a ship that rides atop twin submarines.
BRP Gregorio Velasquez was built by the United States Navy as USNS Melville (T-AGOR-14) for university support of Navy programs. The ship was operated as the research vessel R/V Melville by the Scripps Institution of Oceanography for oceanographic research. As the R/V Melville, it was the oldest active vessel in the academic research fleet, collectively known as the University-National Oceanographic Laboratory System (UNOLS) (UNOLS). The US Government confirmed on 17 November 2015 that the Melville was to be transferred to the Philippine Navy as Excess Defense Articles (EDA)s. The vessel was officially transferred to the Philippines on 28 April 2016 and was commissioned into active service at the same time with the Philippine Navy.
R/V Atlantis is an oceanographic research vessel operated by the Woods Hole Oceanographic Institution as part of the University-National Oceanographic Laboratory System (UNOLS) fleet. She is the host vessel of DSV Alvin. She is named for the first research vessel operated by WHOI, the sailboat R/V Atlantis, for which the Space ShuttleAtlantis is also named.
R/V Thomas G. Thompson (AGOR-23) is a Global-class research vessel owned by the United States Office of Naval Research and operated under a bareboat charterparty agreement by the University of Washington as part of the University-National Oceanographic Laboratory System (UNOLS) fleet.
A multibeam echosounder is a type of sonar that is used to map the seabed. Like other sonar systems, multibeam systems emit acoustic waves in a fan shape beneath the transceiver of the multibeam echosounder. The length of time it takes for the sound waves to reflect off the seabed and return to the receiver is used to calculate the water depth. Unlike other sonars, multibeam systems use beamforming to extract directional information from the returning soundwaves, producing a swath of depth readings from a single ping.
HMNZS Tui, formerly USNS Charles H. Davis (T-AGOR-5), was one of nine Conrad class oceanographic ships built for the United States Navy (USN), that later saw service in the Royal New Zealand Navy (RNZN). Serving with the USN from 1963 to 1970, these ships were designed to perform acoustic experiments on sound transmission underwater, and for gravity, magnetism and deep-ocean floor studies.
Two ships of the United States Navy have borne the name Melville, in honor of George W. Melville, an engineer and arctic explorer.
USS James M. Gilliss may refer to one of the following United States Navy ships:
Two ships of the United States Navy have borne the name Thomas G. Thompson, in honor of oceanographer Thomas G. Thompson (1888–1961).
USS San Carlos (AVP-51) was a Barnegat-class seaplane tender built for the United States Navy during World War II. San Carlos, named after San Carlos Bay, Florida, was in commissioned from 1944 to 1947 and earned three battle stars for service in the Pacific during World War II. After eleven years in reserve, San Carlos was converted to oceanographic research ship USNS Josiah Willard Gibbs (T-AGOR-1)—named after American scientist Josiah Willard Gibbs—and placed in service as a non-commissioned ship of the Military Sea Transportation Service from 1958 to 1971. In December 1971, the ship was transferred to the Hellenic Navy as Hephaistos (A413), a motor torpedo boat tender. Hephaistos was struck from the rolls of the Hellenic Navy in April 1976.
Robert D. Conrad (T-AGOR-3) was a Robert D. Conrad-class oceanographic research ship that operated from 1962 to 1989. The ship, while Navy owned, was operated as the R/V Robert D. Conrad by the Lamont–Doherty Earth Observatory of Columbia University from delivery to inactivation. The ship provided valuable ocean-bottom, particularly seismic profile, information and underwater test data to the U.S. Navy and other U.S. agencies.
USNS Sands (T-AGOR-6) was a Robert D. Conrad-class oceanographic research ship operated by the Military Sealift Command (MSC) for the Naval Oceanographic Office from 1965 to 1973. During that period she provided ocean-bottom information and underwater test data to the U.S. Navy and other U.S. agencies. The ship was the second naval vessel to be named for Rear Admiral Benjamin F. Sands and his son Rear Admiral James H. Sands, the first being the destroyer Sands (DD-243). The ship operated in the Atlantic on oceanographic and geophysical assignments for the Oceanographic Office and other agencies.
USNS Eltanin (T-AK-270/T-AGOR-8) was an Eltanin-class cargo ship with an ice-breaking hull acquired by the U.S. Navy in 1957 and then operated by the Navy in a non-commissioned status, named after Eltanin, a star in the constellation Draco. Her designation was changed to that of an oceanographic research ship in 1962 when she operated in Antarctic waters.
Thomas G. Thompson (T-AGOR-9) was a Robert D. Conrad-class oceanographic research ship acquired by the U.S. Navy in 1965. The ship was transferred to the University of Washington for operation as part of the University-National Oceanographic Laboratory System (UNOLS) fleet on 21 September 1965. In 1988 the ship went out of UNOLS service. The ship, retaining the previous name, was designated by the Navy as IX-517 assigned to the Mare Island Naval Shipyard for general naval research. Thomas G. Thompson was later renamed Pacific Escort II with the same designation. On 7 May 1997 the Navy renamed the ship Gosport and transferred the ship to the Norfolk Naval Shipyard available for hire as a multi purpose platform from the shipyard. The ship, placed out of service and struck from the register on 27 February 2004, was sunk as part of a NATO exercise 14 November 2004.
Thomas Washington (T-AGOR-10) was a Robert D. Conrad-class oceanographic research ship delivered to the U.S. Navy in 1965. The ship was owned by the Navy but assigned to the Scripps Institute of Oceanography, University of California, La Jolla, California and operated as R/VThomas Washington from delivery to inactivation.
USNS Bartlett (T-AGOR-13) was a Robert D. Conrad-class oceanographic research ship acquired by the U.S. Navy (USN) in 1969. She was named after oceanographer Captain John R. Bartlett of the USN. Bartlett was one of the ships under the technical direction of the Naval Oceanographic Office (NAVOCEANO) operating as an Auxiliary General Oceanographic Research (AGOR) program "pool" ship for support of Navy laboratories on each coast as well as NAVOCEANO projects. The ship was first assigned to support laboratories on the West Coast with last operations in similar support on the East Coast and Atlantic.
RV Pacific Escort is a name used more than once by the U.S. Navy:
RV Neil Armstrong (AGOR-27) is the designation for a new oceanographic research ship, first of the Neil Armstrong-class research vessels, to be owned by the United States Navy and operated by Woods Hole Oceanographic Institution. Secretary of the Navy Ray Mabus announced on September 24, 2012 that the research vessel was to be named after Neil Armstrong, the first person to walk on the Moon and a former naval aviator who served in the Korean War.
RV Clifford A. Barnes is a research vessel owned by the National Science Foundation and operated as part of the University-National Oceanographic Laboratory System fleet. The University of Washington School of Oceanography currently operates the vessel under a charter-party agreement. Other ships in use by the University of Washington include RV Thomas G. Thompson (T-AGOR-23) and Wealander.
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