About this tender
The JT 15 sits one step up from the smallest 14 in Castoldi's modern range. At 4.58m LOA and 2.08m beam, it is sized for tender garages where the 14 leaves cockpit space underused but the 16 will not fit. Single Yanmar diesel waterjet propulsion, Kevlar laminate hull, and Hypalon tubes are the same engineering recipe as the rest of the production line, which is the reason these boats have held value on the brokerage market.
Power is a Yanmar 110 hp diesel coupled to a Castoldi JET 05 waterjet. Top speed is 33 knots; dry weight is around 820 kg. Seven-passenger Cat C certification gives the boat the same nominal capacity as the JT 14 but in a slightly more comfortable hull. We see this size specified on motoryachts in the 30m to 40m range where the JT 14 is a touch undersized and the JT 16 will not fit the lift envelope.
Highlights
The four details we'd point out first to a captain who hasn't seen one on the water yet.
At 4.58m the JT 15 splits the difference between the 14 and 16. For owners whose garage is fractionally too small for the 16, this is the right answer; for owners where the 14 is fine, save the money and go smaller. The half-metre length difference matters meaningfully for working comfort with a full guest load.
Single Yanmar 110 hp diesel coupled to a Castoldi JET 05 waterjet. Service intervals are standard Yanmar; the JET 05 is the smallest unit in Castoldi's Turbodrive family and matches the engine well. Top speed of 33 knots is competent for the size class.
Hand-laid Kevlar and vinylester laminate hull, sandwich-construction deck, factory-built in Castoldi's facility near Milan. Build quality is at the top of the production tender segment, with the consistency that comes from in-house fabrication of hull, waterjet, console and tube on the same site.
The 4.58m length and 2.08m beam fit inside most small-yacht tender garages where the JT 14 also fits. Weight at around 820 kg dry plus engine is similar to the 14. For owners on a 30m to 40m yacht doing the garage feasibility check, treat the 15 as the natural step up if the dimensional envelope allows.
Gallery
The full specification
Specifications, prices, availability, and performance figures are supplied for guidance only and remain subject to confirmation by the yard, seller, broker, survey, contract, and final specification.
Questions, answered
Last call · Available
Castoldi · Albairate, Italy
Tell us about your yacht, your programme, and the missions 15 needs to handle. We come back within 48 hours with a written assessment - fit for the brief, lead time, and trade-offs against alternatives in the same band.
Prefer to talk? +44 (0) 77180 88055 · other ways to reach us
From the library
