Seven Atlantic

Builder / year

Merwede, Netherlands / 2009

Length × beam

144.79 × 26 m

Design draught

7 m

Published deadweight

8,700 t

Working deck

1,200 m²

Deck strength

10 t/m²

Deck cargo limit

3,000 t, 2 m above deck

Accommodation

150 people

Saturation capacity

24 divers

Saturation depth

350 m

Diving bells

Two; 7 m³ each

Hyperbaric evacuation

Two 18-person lifeboats

Surface diving

Two integrated air systems

Positioning class

DP3 / DP(AAA)

DP controls

Kongsberg K-pos 22; K-pos 12 backup

Main lift

120 t, heave compensated

Observation ROVs

Two moonpool systems; 1,200 m rating

Diesel-electric generation

Six × 3,360 kW

AIS identity cross-check

Seven Atlantic — IMO 9419125; MMSI 235071342.

Public AIS-provider identity listing. Review date is not an AIS observation date, ownership confirmation or current certification.

Owner and flag listed by Lloyd’s Register

Subsea 7 Ltd · Isle of Man flag

The public register labels this company “Owner”. It does not separately establish the beneficial owner, commercial operator or charterer. Snapshot reviewed 18 October 2026; publication date not stated.

Registered owner · Isle of Man register

Subsea 7 Limited holds all 64 registered shares.

The public transcript matches IMO 9419125 and states that its data is current at 00:04 UTC on 18 October 2026. Read through the public register without a login; this is not a certified extract. Registered shareholding does not establish ultimate beneficial ownership.

Manager named in flag register

Subsea 7 International Contracting Limited

The flag register names this company in its manager field, separately from the registered owner. No ISM or beneficial-owner role is inferred.

Flag-register status and identity

Active registration at Douglas, Isle of Man. Registered 29 January 2010; official number 740877; call sign 2CBP2.

Active status is as displayed in the public register on 18 October 2026. The registration date is not an ownership-transfer or independently verified delivery date.

P&I entered owner

Subsea 7 Ltd

The IMO-matched public entry places this company under Gard’s P&I Owners heading. This insurance role does not by itself establish registered or beneficial ownership.

Flag recorded by insurer

Isle of Man

Flag as shown in the undated insurer entry reviewed on 18 October 2026; this is not a flag-register extract.

Published operator

Subsea7

Fleet attribution; not a registered-owner certificate.

Published insurance entries · 2026–2027

Gard shows BBC, WRC and two MLC certificate categories covering 20 February 2026 to 20 February 2027.

The MLC categories are Standard A2.5.2 and A4.2.1 paragraph 1(b). These are the periods displayed by the insurer, not independently authenticated certificates or a guarantee that cover remains in force.

Published class

Lloyd’s Register +100A1 DSV

Brochure statement, not current class or survey verification.

Reported equipment loss

Premier Oil reported a PON2 for a 25 kg lift bag lost from the vessel at Balmoral in 2020.

The report is undated as to publication. This historical report does not establish a detention or a current safety rating.

Lloyd’s Register class entry

Classed · Diving Support Vessel · register build date 2010-01

Exact-IMO match in the public Ships in Class search, reviewed 18 October 2026. This is the displayed register status, not a survey report, port-state inspection or assurance of operational readiness. Full ClassDirect records were not accessed. LR shows January 2010 as date of build; the operator specification elsewhere in this profile reports 2009. These dates have not been reconciled.

Yggdrasil, Norway

Active during Q1 2026 alongside Seven Arctic and Seven Falcon.

The source gives the quarter, not individual mobilisation dates.