Neptune Despina and Larissa Offshore Supply Vessels (OSV)

Built for the company Neptune Offshore, the vessels Neptune Despina and Larissa are one-of-their-kinds OSVs (Offshore Supply Vessels). Based on the design models provided by the famed Norway based Ulstein Conglomerate, both the vessels were constructed at the Zhejiang ship building yard in the Ningbo province of China.

Out of the two vessels, Neptune Despina started its operational duty in the October of this year while Neptune Larissa began its operational services in November 2011. Both the vessels are named for the planet Neptune’s moons – Despina and Larissa. The christening observance was carried out in the Zhejiang ship build yard in the month of October, last year.

As OSVs, the major function of the vessels is to act as IMRs (Inspection, Maintenance and Repair) operators in the high seas. Based on this functioning, the ship designing company Ulstein was required to effectuate a model that would provide state-of-the-art features both in terms of the vessels’ design and technology incorporated within it.

Vessels’ Specifications

  • The Neptune Despina and Larissa have a turned-back bow – X-bow designing – which allows them to maintain steadiness even in the most turbulent of high seas’ weather conditions. In addition, this design also allows for increased speed and lesser consumption of fuel 
  • Both the vessels can operate at water depths up to 4000 metres 
  • The OSVs equipment cache consists of Grade II DP system, three cranes – one of 150 tons and two each of six tonnes each – along with two winches of 10 tonnes each. The vessels are also built with a copter hangar and two hangars for putting two Remotely Operated Vessels (ROVs) into operation. Along with these conventional communication enablers like VHF radio systems have also been equipped 
  • In order to enable easier operational activity in the high seas, the vessels have been fitted with a moonpool with an abundance of space measuring 7.5 metres lengthwise x 7.2 metres breadth wise

In terms of dimensions, the OSVs measure almost 99 metres lengthwise, 190 metres breadth wise with a depth of eight metres. The vessels have a draft of about 6.6 metres and have a deadweight tonnage of 4,700 tonnes with a gross tonnage of 7,000 tonnes.

The Despina and Larissa promise to change the outlook of the maritime industry in the high seas with their effective methodologies. As a part of the global future of the maritime industry, these OSVs are indeed vessels to watch out for.

Image Credits: upstreamonline , offshorenieuws

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