Sirena's first steel superyacht, a 42m, sold on spec before launch
A production yard steps up to steel
The 42M is a clean break from the composite motoryachts that made Sirena's name. She measures 42.2 metres with an 8.8-metre beam and a 2.5-metre draft, comes in at 433 gross tonnes, and pairs a steel hull with an aluminium superstructure. Construction began on spec in 2024, and the yard christened this first hull with her owners this week, about two months before her international premiere.
The naval architecture is by Van Oossanen, using its Fast Displacement Hull Form with a Hull Vane foil aft, the same efficiency package that has gone under a run of larger custom yachts. Luca Vallebona drew the exterior, Hot Lab handled the interior, and the layout runs to ten guests in five staterooms.
Why the owner cares
For anyone tracking Sirena as a brand, the point is that it now competes where the full-custom yards do, not just against other production lines. A steel 42-metre carries a different survey, a different flag conversation and a different resale pool than a 30-metre composite, and it puts Sirena's badge on a boat an established owner can step up into rather than out of.
That the hull sold before launch, arranged in-house, is the harder signal. Spec-built steel in the low-40-metre range only gets ordered when a yard is confident a buyer is waiting, and one was. The commercial line from Sirena is that the sale came out of an existing client relationship, which points to a repeat owner trading up inside the range.
The efficiency angle
The Hull Vane is a fixed foil across the stern that recovers energy from the yacht's own wake, and Van Oossanen has spent years claiming double-digit fuel savings from it on displacement hulls. On a 433-tonne yacht that translates into range and running cost, the two numbers a private owner actually feels on a long passage.
Sirena has not published a range figure yet, and the propulsion package is still under wraps ahead of the debut. What is on the record is the intent: a first steel flagship aimed squarely at owners who want a bigger, quieter, longer-legged boat without leaving a builder they already know.
What is good, and what to watch
Strong points
- A real efficiency hull, not a styling exerciseVan Oossanen's Fast Displacement Hull Form with a Hull Vane foil aft is the same package used under a run of larger custom yachts, and Van Oossanen has published years of double-digit fuel-saving claims for the Hull Vane on displacement hulls - this is a proven addition, not new engineering.
- A pre-launch sale is a real demand signalSelling a 42-metre steel flagship on spec, arranged in-house about two months before its public debut, only happens when a yard already has a confident buyer - here, reported as an existing client trading up.
What to watch
- The propulsion package is still undisclosedSirena has not published engine make, power or range for the 42M, so a buyer cannot yet compare running costs or passage range against rivals in the same size class.
- No independent sea trial or owner account exists yetThe hull was only just christened, roughly two months ahead of its international premiere - every figure so far is the yard's own framing, not a tested one.
Practical detail
| Price | Not published. The hull sold in-house before public listing, and Sirena has not disclosed a figure. |
|---|---|
| Build location | Sirena builds at an inland Turkish plant roughly 25 minutes from the coast, not a waterside yard - the hull travels out for launch. |
| Accommodation | Ten guests across five staterooms. |
| Range and propulsion | Not published. Sirena has kept the propulsion package under wraps ahead of the international premiere. |
| What is not published | Sale price, range, propulsion make and power, and confirmed fuel/water tankage. |
Questions this story answers
What happened?
Sirena Marine has sold and christened the first Sirena Superyachts 42M, the Turkish builder's first steel-hulled yacht and the largest it has ever put in the water. A yard best known for production motoryachts has shown that a 42-metre steel flagship can find an owner on spec, roughly two months before it goes on public display. For a buyer weighing the next tier, it is a signal that Sirena now plays a size class up, on an efficiency hull and a full-custom brief.
What is good about it?
A real efficiency hull, not a styling exercise. Van Oossanen's Fast Displacement Hull Form with a Hull Vane foil aft is the same package used under a run of larger custom yachts, and Van Oossanen has published years of double-digit fuel-saving claims for the Hull Vane on displacement hulls - this is a proven addition, not new engineering.
What should an owner or buyer watch?
The propulsion package is still undisclosed. Sirena has not published engine make, power or range for the 42M, so a buyer cannot yet compare running costs or passage range against rivals in the same size class.
Who reported this?
Megayacht News, BOAT International, YachtBuyer.
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