The vessel was named after
John Cabot, a
Venetian explorer from the
Age of Exploration.[citation needed] It was the first Canadian Coast Guard ship to carry the name "John Cabot" or "Cabot". The modern Canadian Coast Guard was founded in 1962. The John Cabot entered service in 1965.[5][11]
Certamen
The ship passed into Italian service, and was renamed to Certamen,[1] a different Italian name than it already had (John Cabot being the Italian explorer
Giovanni Caboto).[12] It carried the callsign IBUC.[3] "
Certamen" refers to competition in Latin.
Certa
When the ship was retired, it was renamed to Certa, and then scrapped.[6][7] "
Certa" refers to surety in Italian.
The ship was ordered in 1962,[15] and built in Montreal in 1964,[2] by
Canadian Vickers.[4][1] It entered service in 1965 with the
Canadian Coast Guard as CCGS John Cabot,[1] callsign CGDJ[16] It was christened John Cabot on 31 May 1965.[13][8] On entry to service it was the only icebreaking cable repair ship in the world, and the first such to be built.[7] The ship was sponsored by the
Canadian Overseas Telecommunication Corporation (COTC), a Canadian Crown Corporation, and worked as part of the Department of Transport.[13][8]
In 1965 and 1966, the John Cabot repaired the submarine cable connecting
Thule Air Base in Greenland to the rest of the world.[17][18] For the efforts in repairing the telecommunications cable in November 1965, the ship's captain, Captain George S. Burdock, was awarded the Shield of NORAD in a ceremony on board CCGS John Cabot, while at dock in the
Port of Montreal on 22 July 1966.[19]
The John Cabot was one of the ships involved in laying the
TAT-5 and SF System transatlantic cables in the 1960s.[20][21]
In 1973, while laying the
CANTAT-2transatlantic cable, in coordination with several other ships, including the submarine
Pisces III, the Pisces III sunk to the seafloor and needed rescue. John Cabot successfully fished up the submarine,
rescuing the crew. The sub had been stuck at 480 m (1,570 ft), becoming the deepest submarine rescue ever.[1][10][22][23][9]
In 1974, the ship suffered a major fire, and was refitted.[1]
In 1983–1984, the ship underwent a midlife refit and modernization.[15]
In 1985, the ship participated in the search for
Air India Flight 182, and its underwater investigation and debris recovery.[24] The ship successfully retrieved the airplane's
black boxes from the seafloor at 2,000 m (6,600 ft) deep.[7]
In 1994,
Teleglobe Canada bought the ship from the Canadian Coast Guard, changing its prefix from CCGS (Canadian Coast Guard Ship) to CS (Cable Ship), becoming CS John Cabot,[1] as a motorized ship, it was also called MV John Cabot.[16] The callsign became VCGM[16]
In 1996, the ship was purchaed by McDermott and refurbished. It was sold to Elettra in 1997 and renamed to Certamen.[1][6]
In 2010,
Orange (France Telecom-Orange) acquired Elettra, and the Certamen was transferred to
France Telecom.[25]
In 2014, the ship was retired and renamed to Certa, and scrapped at
Aliağa, Turkey.[6][5][7]
^
abcdef"New Canadian Icebreaking-Cable Ship: Shipbuilding and Shipping Record, 24 June 1965". Proceedings: Professional Notes, Notebook and Progress. 91/10/752. U.S. Naval Institute. October 1965.
^Cleo D. Anderson; Robert L. Easton (19 February 1970). "An Overview: Requirements and Performance". The Bell System Technical Journal. 49 (5) (published May–June 1970).
^W.B. Hirt; D.O. Oldfather (30 July 1969). "Transmission Tests, Computations and Equalization During Installation". The Bell System Technical Journal. 49 (5) (published May–June 1970).
^Association Des Amis Des Cables Sous-Marins (December 2010).
"Elettra Cede Ses Navires"(PDF). Association Des Amis Des Cables Sous-Marins - Bulletin (in French). Vol. 42. p. 34.