Type 2027 A computer processor hooked to the Type 2020 to determine range based on multiple arrival paths of a target's noise. Multipath ranging.
Type 2046 Royal Navy towed array for submarines. This clip-on array is attached to one of the stern planes.
Type 2072 A new flank array for Royal Navy SSNs, to replace the older Type 2007.
Typhoon SSBN The size of a small WW II battle cruiser, the Typhoon is the largest submarine ever built. Very quiet, and equipped with modern sensors. A total of six units have been built.
U-boat
UAP ESM system on Royal Navy SSNs.
UHF Ultra High Frequency.
Ultra Allied special intelligence during World War II, obtained by the interception and decryption of German Enigma communications.
VHF Very High Frequency.
Victor I & II SSNs Second-generation Soviet SSNs. Larger, quieter, and better equipped than November class. Victor IIs differ from Victor Is in that the Victor IIs have four 650mm torpedo tubes and are about 16 feet longer. A total of twenty-two units were built.
Victor III SSN A further modification of a second-generation design. The Victor III class is the first Soviet SSN that came close to Western standards in terms of quieting and sensors. The teardrop-shaped pod on the rudder is the housing for a towed sonar array. The Victor III is the most numerous class of SSN in the Russian inventory, with twenty-six units built.
VLF Very Low Frequency.
VLS Vertical Launch System. A set of twelve external tubes located in the number two main ballast tank on SSN 719 and on the Los Angeles-class SSN.
VSEL Vickers Shipbuilding Enterprises, Limited. The U.K. equivalent of Electric Boat Company.
Waterfall display Phrase used to describe the appearance that a modern passive sonar display makes while showing bearing versus time information. A contact will look like a bright line on a CRT against a speckled background of other noise sources.
WEO Weapon Engineering Officer. Royal Navy equivalent of the weapons officer; however, the WEO is not eligible for command.
XO Executive Officer. U.S. Navy term for the second in command of a ship.
Bibliography
Anderson, William R., with Clay Blair, Jr.
Baker, A.D., ed.
Barron, John.
Blake, Bernard, ed.
Breemer, Jan.
Burdic, William S.
Bureau of Naval Personnel.
Compton-Hall, Richard.
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Crane, Jonathan.
Crouch, Holmes F.
Daniel, Donald C.
Donitz, Karl.
Dolphin Scholarship Foundation.
Earley, Pete.
Frieden, David R., ed.