Castoro Sei

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Castoro Sei
Castoro Sei in the port of Almería
Castoro Sei in the port of Almería
Ship data
flag BahamasBahamas (trade flag) Bahamas
Ship type semi-submersible pipeline ship
Callsign C6DF4
home port Nassau, Bahamas
Owner Saipem Portugal Comercio Maritimo Lda., Funchal
Shipyard Italcanteri
Build number 4334
Keel laying May 20, 1975
takeover October 1, 1978
Ship dimensions and crew
152 m ( Lüa )
width 70.5 m
Draft Max. 15.5 m
measurement 31,506 GT, 9,451 NRZ
crew up to 330
Machine system
machine 8 diesel engines in a diesel-electric system
performanceTemplate: Infobox ship / maintenance / service format
23,600 kW (32,087 hp)
propeller 4 propeller pods with 8240 kW

3 tensioners with 110 t each,
pipeline diameter up to 60 inches


9 workstations for welding, testing and coating the pipeline

Helicopter deck

to Sikorsky S-61

Classifications American Bureau of Shipping
IMO 8758603

The Castoro Sei is a work ship for the largest Italian offshore service provider Saipem , a former subsidiary of the energy company Eni . The ship, which was built between 1975 and 1978 by the Italian shipyard Italcanteri in Trieste , sails under the flag of the Bahamas and is used as a sea-going pipeline ship.

Structure and technology

Hull and drive

Like many large work ships in the offshore industry, the Castoro Sei is designed as a semi-submersible ship , which means that she is able to vary the draft by controlled flooding of ballast tanks. The draft, which is around 9.5 m at the overpass, is increased to 15.5 m for work, which increases stability . The working deck is located around 30 m above the lower edge of the two floats to which it is connected via ten columns.

The Castoro Sei uses a diesel-electric drive for locomotion and positioning . The ship is powered by four pivoting propeller pods ( Voith radial propellers ) with a total output of 8240 kilowatts (kW), which draw their electrical energy from eight generators with 4500 kilo voltampere  (kVA) each . The generators are driven by eight diesel engines with a total output of 23,600 kW.

Twelve 25 t anchors are used for anchoring, which are attached to 3000 m long steel cables with a diameter of 76 mm. The anchor winches achieve a pulling force of 124 t.

Pipeline laying and other equipment

The pipelines are laid using the S-Lay method and are possible up to a diameter of 1.5 m (60 inches). The three tensioners achieve a pulling force of 110 t each. The welding, the testing of the weld seams by means of non-destructive material testing and the coating of the weld seams with plastics take place on up to nine work stations .

Accommodation and helicopter deck

The living module offers space for 330 people. The accommodation complies with international safety standards and, in addition to the cabins, offers relaxation areas, offices, an infirmary, a cafeteria, a cinema and a fitness center. The helicopter deck is approved for helicopters up to the size of the Sikorsky S-61 .

Technical specifications

  • Working deck height: 29.8 m
  • Total load capacity of the deck: 3,600 t
  • Storage area for pipelines: 1,195 m²
  • Other deck area: 1,525 m²

Web links

Commons : Castoro Sei  - Collection of images, videos and audio files

See also


  1. a b c d Ship data of the Castoro Be at the classification society American Bureau of Shipping (English, accessed on April 24, 2012)
  2. a b c d Brochure about the Castoro Sei on the Saipem website (English, PDF file, 573 kB, accessed December 15, 2009)