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Castoro Sei

semi-submersible · built 1978

IMO8758603No AIS position on record

In short

Castoro Sei (semi-submersible) has no AIS position on record with Voydar. Registered owner: Saipem (source: Wikidata).

Vessel type
semi-submersible
Flag
—
Year built
1978
Gross tonnage
31,506
Size (length × beam)
152 m × 71 m
Registered owner
Saipem

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Photo of Castoro Sei
Photo: Philfaebuckie · Licence: CC0 · via Wikimedia Commons

Last reported position

No AIS position on record for this vessel. Identity and particulars are below.

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Identity & particulars

Name
Castoro Sei
IMO numberWhat is an IMO number?
8758603
Flag
—
Vessel type
semi-submersible
Gross tonnageGross tonnage vs deadweight
31,506
Length overall
152 m
Beam
70.5 m
Year built
1978

A tag next to a value names the register that supplied it (hover or tap it for the record and date). Values without a tag come from the ship's own AIS broadcasts or from Wikidata. Position and identity are derived live from AIS.

Ownership & management

Each line shows where the fact comes from. Links backed by an identifier point to the company page.

Registered owner
Source: Wikidata · reported · confidence 0.8 · retrieved Sep 22, 2026
Builder
Source: Wikidata · reported · confidence 0.8 · retrieved Sep 22, 2026

About Castoro Sei

The Castoro Sei (Italian for Beaver Six) was a column-stabilized semi-submersible pipelay vessel. She had an overall length of 152 metres (499 ft), a width of 70.5 metres (231 ft) and an operating draught of 7.8 to 15.5 metres (26 to 51 ft). The Castoro Sei was equipped with 2 rotating gantry cranes of 134 tonnes capacity, three 130 tonnes pipe tensioners and a 400 tonnes abandon and recovery winch for pipelaying. She provided accommodation for 354 people. The firing line comprises the fixed pipelay ramp, enclosed in the central housing, running along the longitudinal centreline of the vessel. It is connected to an internal and external ramp, both of which have adjustable inclination to facilitate pipelay in varying water depths. A ramp extension unit is available for use in deep water or for severe seabed conditions.

Summary from Wikipedia, licensed CC BY-SA.

Frequently asked questions

Where is Castoro Sei now?
Voydar has no displayable AIS position for Castoro Sei in this profile. A coverage gap does not establish whether the ship is transmitting or where it is now.
What kind of ship is Castoro Sei?
Castoro Sei is a semi-submersible, built in 1978 by Fincantieri. The vessel is 152 m long with a beam of 70.5 m and has a gross tonnage of 31,506.
Who is recorded as the owner or manager of Castoro Sei?
Saipem is recorded as Registered owner for Castoro Sei (source: Wikidata). This source record does not independently confirm today’s ownership or management.
What sanctions and inspection records does Voydar hold for Castoro Sei?
Voydar has no matched sanctions record displayed for Castoro Sei from the OFAC SDN list, the UK Sanctions List, the Canadian autonomous sanctions list, the EU list of designated vessels, the New Zealand Russia Sanctions Register and the French national asset-freeze register. Coverage may be incomplete; this is not sanctions clearance. No matched inspection records are displayed for Castoro Sei. Missing records do not establish whether the ship has been detained.

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