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USS MONOB I (YAG 61) early in her career.
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Class: MONOB I (YAG 61)
Design: Navy YW 83
Displacement (tons): #,###
Dimensions (feet): ###.#' x ##.#' x ##.#'
Original armament: 4-5"/38
Later armaments: (19xx) 4-20mm
Complement: ###
Speed (kts.): ##.#
Propulsion (HP): #,###
Machinery: turbines, # screw

61MONOB I1969Zenith Dredge1 Dec 19423 Apr 1943Jun 1970

YAGNameTInactStrikeDisposalFateMA Sale
61MONOB IDECOM2 Aug 19962 Aug 1996Trf.--

Class Notes:
Former World War II water barge YW-87 converted by the Norfolk Naval Shipyard between 1 July and 1 October 1960 to a "Mobile Noise Barge" (MONOB) for use in the Navy's ship-silencing program and first used during the acoustic trials of a submarine in January 1961. She was designed to be towed to her operating area by a tug and would then use a 220 horsepower outboard unit to maneuver at about four knots within that area. She first operated in deep (over 400 fathoms) and acoustically quiet waters in the Key West area. In around 1966 the AUTEC (Atlantic Undersea Test and Evaluation Center) and TOTO (Tongue of the Ocean) acoustic ranges in the Bahamas entered service, and according to her unofficial insignia she "sailed the triangle" between Florida, Exuma Sound, and the TOTO range, one of her functions being to tend large buoys. She operated from Port Everglades, Port Canaveral, and the U.S. Naval Mine Defense Laboratory at Panama City, and was under the technical cognizance of the David Taylor Model Basin in Carderock, Md. and its successors. She was reinstated on the Naval Vessel Register in early 1969 as IX 309, probably at the same time as IX 308, and on 1 July 1970 was redesignated YAG 61. She later served in the Carderock Acoustic Trials Detachment to support the ballistic missile submarine silencing program. DEER ISLAND (YAG 62) was employed from 1982 in similar underwater sound programs. [For insignia see https://www.usmilitariaforum.com/forums/index.php?/topic/288560-usn-yard-craft-yos-yogs-ytbs-ytms-yns-etc/]

Ship Notes:
61MONOB I(ex-IX-309 1 Jul 1970, ex-YW-87, compl. 17 Oct 1943). Active June 1970. Trf. to Mexico as Rio Suchiate (BI-05) (BI = Buque investigacion, or surveying ship)

Page Notes:
Compiled: 21 Oct 2021
© Stephen S. Roberts, 2021
Sources: DB, Maroon, NVR, Navsrc