The boat, and how she handles Curaçao's waves
We're often asked why we chose a Rupert 50. The honest answer is physics: this boat is built to stay comfortable in the trade-wind chop of Curaçao's waters.
Why this hull handles waves
Curaçao's trade-wind seas typically run 0.5–1.5 m, occasionally 2 m or more. The Rupert 50 was engineered for conditions harder than that, and the geometry shows.
First: the waterline. At 14.2 metres, the Rupert has a long waterline, so the hull cuts through wave-tops instead of slamming into them and stays level over the swell.
Second: the deep-V. The Rupert's hull deadrise is steep, built to slice through chop without pounding. The keel runs deep enough to track straight even in cross-seas.
Third: the mass. We chose 5,500 kg (12,125 lb) on purpose. The hull stays in contact with the water, riding through the trough and over the crest like a knife. Mass also lowers the centre of gravity, so guests don't get thrown around.
Why the Scania + KaMeWa configuration
We run a single inboard Scania DI14 marine diesel driving a Rolls-Royce KaMeWa FF 375 HS waterjet. There's a reason.
Outboard propellers cavitate in waves: the propeller breaches the surface, ventilates, and the engine over-revs as it loses bite. Pilots have to back off the throttle in cross-seas, which makes the ride slower AND more uncomfortable. A waterjet has no such problem: the impeller draws water from below the hull through a sealed intake, so it bites consistently regardless of wave action.
Second: torque. The Scania DI14 is an 800 hp 14-litre twin-turbo V8 designed for heavy marine work. It produces strong low-end torque, so the boat accelerates out of a wave trough cleanly, without lag or over-revving.
Third: shallow water. A waterjet has no propeller hanging below the hull, so the boat can work close to shallow entrances. It also means there's no spinning propeller in the water around swimmers: a real safety margin in busy snorkel zones.
Why professionals choose this configuration
Professional operators who have to perform in any condition, such as coast guards, search-and-rescue services and harbour pilots, choose their hull and propulsion for exactly that.
Coast guard and SAR units around the world increasingly run jet-driven boats with deep-V hulls and inline-diesel power. The reason is simple: you can't predict sea conditions when you launch. A boat that's only fast in flat water is useless when the weather turns. The Rupert 50 is not built to that brief, she is one of them: Rupert Marine built her in Sweden as a search-and-rescue vessel, CE category B1, and we had her converted to carry guests. Her deep-V hull is wave-piercing, so she cuts the chop instead of landing on it. She is a working boat first and a recreational platform second, and that is exactly why we bought her.
What this means for Curaçao's trade-wind seas
On a typical Curaçao day, with 12–18 knots of trade wind and 0.5–1.5 m chop, the Rupert 50 cruises at 30–35 knots without anyone needing to brace. We don't market this as 'extreme'; it's the opposite. The whole point is that the trip should feel calm, even at speed.
Speed and comfort
The Rupert 50's design, with its long waterline, deep-V geometry, deliberate mass, jet propulsion and diesel torque, is what lets you have both. It's geometry and engineering.
Ready to come aboard?
We open public bookings from December 1, 2026. Reserve a date now to lock it in: small-group snorkel tours, Klein Curaçao day trips, and sunset cruises with 30 guests maximum.
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