Equipped with a moonpool and an integrated ROV-hangar and can perform subsea operations like Inspection, Maintenance and Repair (IMR) in deep water. The vessel has the Clean Design (double hull), comfort class V3 and dynamic positioning (DPII) classifications.

Vessel type




Built by

Zhejiang Shipbuilding



Owned by

Neptune Subsea AS

Designed by

Ulstein Design & Solutions AS

Ordered by

Neptune Offshore AS

Operated by

Golden Energy Offshore

IMO Number


Principal dimensions

98.6 m
19 m
Dead weight:
3538 tonnes
Draught (max):
6.6 m
Speed (max):
14 kn
60 POB
Deck area:
775 sqm

Note: Subject to selected variant configuration


Fuel oil:
870 cbm
Fresh water:
1260 cbm
Water ballast:
1520 cbm
920 cbm
550 cbm


  • DPII
  • COMF-V(3)C(3)

Featured solutions

Ship history

‘Larissa' (yno ZJ2012) was delivered on 15 November 2011. She is ULSTEIN design number 50 from Ulstein Group.

The sister vessels ‘Despina’ and ‘Larissa’ are IMR vessels of the ULSTEIN SX130 design. The vessels were constructed for shipowner Neptune Offshore at the Zhejiang yard, China and were named in a joint ceremony on 26 October 2011. They were originally named 'Neptune Despina' and 'Neptune Larissa'.

At the time of delivery, Reef Subsea announced their signing of two five-year charter agreements for the two vessels. The vessels therefore changed names to ‘Reef Larissa’ and ‘Reef Despina’.

ULSTEIN has supplied design, detail documentation and main equipment for these vessels, including products such as main switchboards, bridge and control room consoles, ULSTEIN IAS® (integrated alarm and surveillance system), ULSTEIN COM® and navigation equipment and ULSTEIN PMS (power management system).

The X-BOW®, combined with diesel-electric propulsion system, ensures excellent performances with regards to fuel consumption, sea-keeping and speed.

2016: Golden Energy Offshore has management of the vessel and her sister vessel.

May 2017: Working on the Njord Field at Haltenbanken, Norwegian sector of the North Sea for Fugro, who is contracted by VNG. Operates as an IMR vessel, equipped with two work class ROVS, a full survey package and fully calibrated surveillance/navigation systems.

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