UT-Class Platform · DNV Ice-Class

The most successful working hull form ever drawn — converted.

The Ulstein UT family converts into a four- to five-deck ice-class expedition yacht with helideck, garage, and twin-engine redundancy at a fraction of the cost of a comparable purpose-built expedition yacht.

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Ulstein UT-class ice-class supply vessel — candidate platform for expedition yacht conversion, port bow view
Hull Family
Ulstein UT
Class
DNV Ice-Class
Size Range
75–110m
Availability
Periodic

About the UT family

Ulstein’s UT-series — UT-712, UT-722, UT-755 and their derivatives — defined the modern North Sea offshore supply vessel. Twin-screw, ice-class, deep tankage, large after deck, redundant propulsion, and a hull form proven over thousands of operating hours in the harshest commercial-marine environment in the world. The series is arguably the most successful working hull form ever drawn.

When these vessels come off active service, they become the most capable expedition-yacht conversion candidates in the world. The hull does not need re-engineering; what changes is the interior, the deck arrangement, and the finish.

What the conversion looks like

  • Four- to five-deck superstructure on the existing UT hull form
  • Forward owner’s deck with private terrace; aft guest decks
  • Helideck above the bridge or aft, depending on size variant
  • Garage and tender bay forward of the engine room; dive ops and ROV staging
  • Twin-engine diesel-electric or diesel-mechanical retained; hybrid-ready
  • Ice-class certification preserved through the conversion
  • Guest accommodation for 10 to 14; crew for 14 to 22

Why this platform converts so well

Ice-class hulls cannot be built into an expedition yacht after the fact. They have to be there from the steel up. UT vessels arrive at the conversion yard with class, redundant propulsion, deep tankage, and a deck arrangement that maps almost directly onto expedition-yacht service. What would cost $80M+ and 36 months as a new build becomes a $40M–$55M, 14- to 20-month conversion with superior ocean capability.

How we work with UT candidates

UT vessels do not appear on yacht-listing portals when they retire. They move through commercial brokerage channels and direct owner-to-owner transactions. We track active and laid-up UT tonnage through our Norwegian, Dutch, and UK relationships, and surface candidates to clients who have defined a UT-based mission. Expect a 6- to 18-month search timeline for the right platform.

The hull is the work. Find the right UT, and most of the yacht’s ocean-going engineering is already done.

UT-Series Mission Brief

If a UT-based expedition yacht fits your mission, contact Paul. We will define the search criteria and surface candidates as they become available.

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