MV Cory Chouest

	MV Cory Chouest
History
United States
Name	Cory Chouest
Owner	Edison Chouest Offshore
Launched	6 April 1974
Acquired	leased for 5 years by the U.S. Navy, date unknown
In service	as MV Cory Chouest in 1989
Identification	IMO number: 7382536; MMSI number: 303401000; Callsign: WRYF;
Fate	Returned to Louisiana for redelivery to the owners
General characteristics
Type	ocean surveillance ship
Tonnage	2,667 DWT
Length	265'
Beam	60'
Draft	14'
Propulsion	two diesels, two shafts, 4,000bhp
Speed	11 knots
Complement	16 civilian mariners, 41 military and sponsors
Sensors and ; processing systems	both passive and active low frequency sonar arrays
Armament	none

MV Cory Chouest is an

SURTASS equipment removed and was returned to her original owners in 2008 completing nearly 20 years of service.^[1]

Construction

Cory Chouest was acquired and modified by Edison Chouest Offshore for use by the U.S. Navy as a modified TAGOS vessel. Originally used as a research platform in conjunction with the Amy Chouest, the Cory was later modified to carry an active and passive sonar system. The vessel served until October 2008 when it went off charter.

Mission

The mission of Cory Chouest is to directly support the Navy by using both passive and active low frequency sonar arrays to detect and track undersea threats.

Operational history

In January 1991, the Cory Chouest and Amy Chouest were used as part of the

Southern Indian Ocean^[2] as far as both ocean coasts of the US and Canada.^[3] The Cory Chouest was chosen because of its central moon pool and because it was already equipped with an array of low frequency transmitters. A phase-modulated 57Hz signal was used. The experiment was successful and demonstrated that such sound waves could travel as far as the antipodes

. Planned transmissions had been for ten days, although owing to the bad weather conditions and the high failure rate of the transmitter elements, used at a frequency below their design frequency, the transmissions were terminated on the sixth day, when only two of the original ten transducers were still working.