BEL1

• LOA: 49.9 m
• Beam: 8.9 m
• Gross tonnage: 499 GT
• Hull: Aluminium hull and superstructure, teak deck, three decks
• Design: Fulvio de Simoni (exterior), Enrico Gobbi (interior)
• Propulsion: Twin Caterpillar C32 diesels, around 1,622 hp each
• Performance: Top speed near 18 knots, range about 4,000 nm at 10 knots
• Guests and crew: 10 guests in 5 cabins, 10 crew (delivered June 2024)

A compact full-custom statement

BEL1 was delivered in June 2024 as a full-custom 49.9 metre yacht built entirely to one owner's brief. She sits at the smaller end of the modern Rossinavi fleet, yet she carries the same one-off approach as the yard's larger boats. The aluminium hull keeps her at 499 GT, a figure that brings real advantages in crew rules and running costs. Staying under 500 GT keeps her within a lighter set of regulations, which trims both paperwork and crew count.

For the yard, BEL1 shows that its custom model works at sub-50 metre size, not only on flagships. Owners who want a genuinely bespoke yacht at this length often struggle to find a builder willing to treat the project as a true one-off. BEL1 answers that gap directly. Plenty of yards will sell a semi-custom hull at this length, but a fully bespoke one is harder to find.

De Simoni outside, Gobbi inside

The exterior came from Fulvio de Simoni, a designer with a long record in Italian yachting. He gave BEL1 a clean, slightly muscular profile with high freeboard that lends the boat presence beyond her length. The aluminium hull and superstructure sit over three decks, with teak underfoot. De Simoni has drawn Italian yachts for decades, and that experience shows in a profile that looks settled rather than fussy.

Enrico Gobbi of Team for Design took the interior, bringing the warm, tailored feel seen across much of the recent Rossinavi fleet. The pairing of two established Italian names kept the whole boat coherent from waterline to sundeck. The look is modern with no chasing of passing trends. Using two well-known studios also reassured an owner spending heavily on a one-off.

Full-custom at 49.9 metres, with an enclosed beach club and Atlantic range.

Big-boat amenities at 50 metres

BEL1 sleeps ten guests across five cabins, with four cabins on the lower deck, and a crew of ten to run her. The headline social space is an enclosed beach club with folding side terraces that open the transom to the sea. It is the kind of feature usually reserved for larger yachts, worked into a compact hull. Opening the transom this way blurs the line between the yacht and the water, which is exactly what owners ask for at anchor.

Above, a 145 square metre sundeck carries a pool, and the boat also packs in a gym and a convertible cinema. For a 49.9 metre yacht, the amenity list is dense, which speaks to careful use of every deck. The main deck cockpit gives the owner a quieter spot away from the busier areas. Fitting all of this into a sub-50 metre hull without it feeling cramped is a real test of the design team.

Aluminium, stabilised and Atlantic-ready

Power comes from twin Caterpillar C32 diesels of around 1,622 hp each, giving a top speed near 18 knots and an economical 10 knot cruise. Stabiliser fins keep her steady at anchor and under way. The aluminium build helps performance and holds the boat under the 500 GT line. The C32 is a familiar engine that yards and crews know well, which keeps servicing straightforward in far-flung ports.

With a range of about 4,000 nautical miles at 10 knots, BEL1 is set up to cross the Atlantic under her own power. That makes her a practical choice for an owner who wants to move between the Mediterranean and the Caribbean with the seasons. The compact size keeps running costs lower than a larger yacht while still allowing serious passages. That ocean reach turns her from a coastal boat into one that can genuinely follow the sun between hemispheres.

The sweet spot around 50 metres

The 45 to 50 metre band is one of the busiest parts of the market, and a full-custom boat like BEL1 stands out against the semi-custom competition. Buyers at this size often want the flexibility of a bespoke build without stepping up to the cost of a 60 metre yacht. BEL1 is pitched precisely at them. The gap between semi-custom and full-custom at this length is where she makes her case most clearly.

For Rossinavi, she reinforces a reputation for treating every commission as unique, whatever the length. A recent delivery with a strong design pedigree and a heavy amenity count should give her a solid position if she ever reaches the brokerage market. She rounds out a fleet that now stretches from compact customs to polar explorers. She is a reminder that the yard treats a 50 metre commission with the same care as a 70 metre flagship.

Design

• Exterior: Fulvio De Simoni
• Interior: Enrico Gobbi - Team for Design
• Naval architecture: Rossinavi (in-house)

Who it is for: An owner who wants a true one-off at around 50 metres, with big-yacht features and the range to follow the seasons across the Atlantic.

Guide price: Full-custom private commission; no public asking price. 49.9m all-aluminium, delivered June 2024.