Expedition Conversion Candidate
Project Octant
78-Metre Ulstein Ice-Class AHTS — Conversion
257 ft (78 m) · Ulstein UT 712 L · Built 2006 · DNV Ice Class C · DP-II
78-Metre Ulstein Ice-Class AHTS — Conversion
257 ft (78 m) · Ulstein UT 712 L · Built 2006 · DNV Ice Class C · DP-II
A Norwegian-built winter hull to DNV Ice Class C — framed and plated for high-latitude operation, not an open-water hull sent north on a promise.
Redundant dynamic positioning — hold station over a dive site, a submersible launch or an anchorage in a seaway, hands-off.
Twin Bergen mains and five thrusters — power to tow, to punch through weather and to carry a full expedition payload anywhere.
A noise-and-vibration comfort notation rare on a working hull — a quiet, refined ride is already engineered in.
A 2006 Ulstein UT 712 L — 17,520 BHP, 201-tonne bollard pull, DP-II and DNV Ice Class C, already carrying a COMF (V3) comfort notation seldom seen on a working hull.
Standard capability is built into the hull today; optional systems are engineered in during conversion.
The Yacht Channel · Project Octant — the platform and the conversion brief
A conversion is far more than a technical upgrade. It is the transformation of a proven, ocean-tested hull into a yacht with new purpose, new value and a life of its own — and it rewards the owner who can see what others cannot.
The hull, machinery and class are proven. The conversion re-imagines everything above and around them for owner-standard global expedition service — from the tropics to the poles. In outline, the scope includes:
Grant Maughan's conversion study — the ice-class anchor-handler re-imagined as a global explorer yacht: twin helidecks, tender, submarine and toy handling, a beach club and owner decks above the proven hull.
Conversion renderings — Grant Maughan Design. Indicative concept; final arrangement to owner specification.
Detailed specifications, the general arrangement, conversion pricing and the complete gallery are released to registered principals. Register your mission brief — it goes straight to Paul M. Madden.
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| Builder / Design | Ulstein UT 712 L — AHTS |
|---|---|
| Built | 2006 · Norway flag |
| LOA / LBP | 78.30 m (257 ft) · 68.20 m |
| Beam / Depth | 17.20 m (56 ft) · 8.30 m to main deck |
| Draft (max) | 6.80 m |
| Classification | DNV +1A1 Tug / Supply Vessel · E0 · DYNPOS AUTR · ICE C · Clean · COMF (V3) · Oilrec (NOFO 2004) |
| Main Engines | 2 × Bergen B32:40V12P — 16,320 bhp · 17,520 BHP total incl. thrusters |
| Thrusters | Fwd azimuth 883 kW · bow 883 kW · stern 883 kW + 2 × 800 kW |
| Dynamic Positioning | Kongsberg Icon DP System Class 2 |
| Bollard Pull | 201 tonnes continuous (incl. VROS) |
| Speed | 18 kn max · 12 kn service · 3.5 t/day on DP |
| Tonnage | 3,102 GT · 1,047 NT · ~2,900 t DWT |
| Fuel / Fresh Water | 1,064 m³ · 1,080 m³ |
| Working Deck | 510 m² (35.4 × 14.4 m) · 900 t cargo · 5/10 t/m² |
| Cranes | 2 × 3 t @ 13 m rail cranes with manipulators |
| Fire-Fighting | FiFi Class FF1 (Hamworthy) |
| Accommodation | 24 persons air-conditioned · LSA for 28 |
Speed, tankage and class notations per builder and current class records; to be confirmed at pre-purchase survey.
Call or register at XplorerYachts.com
Safe, comfortable expedition ops
Full owner-standard build
Vessel pricing is provided on application. Commercial-vessel prices move with charter and market conditions, so we do not publish them — contact Xplorer Yachts or register at XplorerYachts.com for current pricing. Conversion scope, and therefore cost, ranges from a yacht-support refit to a full global expedition yacht; a comparable new build is 36+ months.
