BMT Nigel Gee

A naval architect that never builds a yacht itself

BMT Nigel Gee is the engineering office behind the hull, not the name on the brochure. The firm draws the underwater lines, works out the structure, and answers for how a yacht actually behaves at sea, while a separate studio draws the profile and a third fits out the interior. On the very large, technically unusual yachts this firm is known for, that division of labour matters more than usual: a mistake in the naval architecture on a 100-metre hull cannot be styled away later.

The firm's own account of its business is blunt about the split. It calls itself an independent naval architecture and marine engineering consultancy, not a yacht design studio, and its public case studies are framed around stability, structure and seakeeping rather than looks. That focus is also why most buyers never hear the name: a yard's marketing tends to credit the exterior and interior designers by name and leave the naval architect as a technical footnote, if it is mentioned at all.

From fast ferries to giant yachts

The practice started in June 1986 as Nigel Gee and Associates, a three-person consultancy built on high-speed craft rather than yachts. Its early reputation came from fast passenger ferries and complex naval hulls, including work that fed into the US Navy's 60-knot littoral combat demonstrator Sea Fighter, and that grounding in speed and seakeeping under load is the direct ancestor of the superyacht work that followed. The company became part of BMT Group in 2001 and took the BMT Nigel Gee name it carried into the yacht market.

Its first superyacht commission came in 1992, more than a decade before the Oceanco relationship that would define its public profile. What the ferry and naval background gave the yacht practice was a comfort with problems most yacht studios never see: hulls that have to be fast AND efficient AND survive real sea states, not just look right at the dock. That is the pitch to a yard building something genuinely oversized or unconventional, rather than a scaled-up version of an existing model.

Black Pearl's three DynaRig masts trim 2,900 square metres of sail in about seven minutes flat, and the naval architecture behind that trick started as a Southampton engineering brief, not a styling sketch.

Equanimity, and the 1MDB coda nobody designed for

Equanimity is a 91.5-metre yacht delivered by Oceanco in 2014, with naval architecture by BMT Nigel Gee, built for a client who would later become infamous for reasons that had nothing to do with the engineering. The yacht itself was unremarkable in the sense that matters here: a large, well-built, seaworthy hull doing exactly what its naval architects designed it to do, with a Jacuzzi pool, a sauna and berths for 26 guests and 31 crew.

Her second act had nothing to do with BMT Nigel Gee's work and everything to do with her ownership. Equanimity was seized by Indonesian authorities in February 2018 as part of the US Department of Justice's investigation into Malaysia's 1MDB sovereign wealth fund, having reportedly cost around 250 million US dollars to build. She was auctioned in 2019 for 126 million dollars to Genting Malaysia, which renamed her Tranquility. The naval architecture survived the scandal intact; it is worth separating a hull's engineering from what a buyer later does with the finished yacht.

Aquijo and Jubilee, the projects either side

Between Equanimity and Black Pearl sit two more BMT Nigel Gee projects for Oceanco that get less attention but carry real weight in the portfolio. Aquijo is an 86-metre sailing yacht delivered in 2016, one of the largest sailing superyachts built this century, and a very different engineering brief from a motor yacht: rig loads, righting moment and hull stability under sail all have to be solved together, not styled around.

Jubilee, known during construction as hull Y714, is a 110-metre project that pushed the same Oceanco/BMT Nigel Gee partnership toward the very largest end of the custom-yacht market, in the years immediately before the naval architecture relationship moved to the new joint venture. Together, Aquijo and Jubilee show the range the practice was working across in a single decade: an 86-metre sailing yacht and a 110-metre motor yacht, engineered by the same naval architecture team that had already delivered a 91-metre motor yacht and would go on to deliver the largest DynaRig sailing yacht in the world.

Black Pearl, and the physics the DynaRig had to survive

Black Pearl is the project that made BMT Nigel Gee's superyacht naval architecture famous, even if most coverage credits Oceanco or the DynaRig system itself. Delivered in March 2018 at 106.7 metres, she is the largest yacht in the world carrying a DynaRig, a three-masted, free-standing carbon rig that trims roughly 2,900 square metres of sail automatically in around seven minutes. Getting a hull and structure to carry those rig loads, at that size, with hybrid propulsion aboard, was a naval architecture problem before it was ever a sailing spectacle.

The public numbers are the ones a naval architect actually has to hit: a steel hull and aluminium superstructure, roughly 2,864 gross tons, accommodation for 12 guests in six staterooms, and sailing speeds in excess of 30 knots, with a design target of crossing the Atlantic on a fraction of the fuel a motor yacht that size would burn. None of that is visible in a photograph of the boat under sail; all of it sits underneath the masts that make the photograph worth taking.

2018, and the handover to Lateral Naval Architects

In 2018, the same year Black Pearl was delivered, BMT Nigel Gee and Oceanco formalised their decade-long partnership into Lateral Naval Architects Ltd, a joint venture based in a refitted two-storey studio at Shamrock Quay, Southampton, staffed by around 50 engineers and naval architects under managing director James Roy. The new company was described at the time as engineering four separate new-builds over 100 metres at once, alongside a host of smaller projects.

For a buyer or a yard researching this practice today, the distinction matters. BMT Nigel Gee's own name continues for commercial, defence and smaller-craft naval architecture, but the 100-metre-plus superyacht practice that produced Equanimity, Aquijo, Jubilee and Black Pearl now trades as Lateral Naval Architects, not BMT Nigel Gee. Anyone approaching the parent brand today for a large private yacht commission is, in effect, asking for a division that has already moved house.

What the commission actually buys

Hiring this practice, under either name, buys naval architecture and structural engineering only: hull form, stability, weight distribution, structural scantlings and the sign-off a classification society needs before steel is cut. It does not buy a profile, an interior, or even a general arrangement plan in the sense an owner would recognise from a brochure; those come from separate studios, commissioned separately, often before the naval architect is even in the room.

On every project traced in this research, the naval architecture was commissioned by the yard, Oceanco, rather than directly by the private owner. That is the normal pattern for a firm this specialised: an owner buys a yacht from a builder, and the builder brings in the naval architecture it already trusts. A private client wanting this specific engineering pedigree on a different yard's project would need to ask the yard to bring Lateral Naval Architects in as a subcontractor, which is possible but not the practice's usual route to work.

What it costs, and what nobody publishes

Neither BMT Nigel Gee nor Lateral Naval Architects publishes a fee scale for naval architecture work, and this research found no independently reported day rate or percentage figure specific to either name. The nearest public benchmark is the market-wide band: SuperYachtReview's 2026 price guide, updated March 2026, puts naval architecture consultancy at roughly 1 to 5 per cent of build cost across the industry, with construction supervision billed separately and by the hour.

That figure is a guide, not a quote, and it almost certainly undercounts the true cost of engineering something the size of Black Pearl or Jubilee, where the naval architecture has to solve problems no standard formula covers. What is clear is that none of the public case studies in this research disclose an actual fee, a day rate, or even a rough total for the naval architecture line item on any of these projects; that figure sits entirely inside the commercial relationship between the yard and the practice.

Who else can build to these numbers

The honest answer is very few yards, which is why this practice's public portfolio is so tightly bound to one of them. Oceanco is the only builder credited across every 100-metre-plus project traced in this research, and the practice's identity as a naval architecture office capable of giga-yacht and DynaRig-scale engineering is, in the public record, inseparable from that one client relationship.

That concentration is not necessarily a weakness in the engineering itself, but it is a real gap in independent evidence: a buyer cannot point to a public case study of this naval architecture team delivering a comparable result for Feadship, Lurssen or Amels, because none surfaced in this research. Anyone weighing this pedigree against a rival naval architect should ask directly what non-Oceanco large-yacht work the practice can show, rather than assume the Oceanco portfolio generalises.

Pour qui: Yards and owners who need the physics of a very large or technically unusual hull solved first, independent of who ends up drawing the profile or fitting the cabins.