39'5" Sport RIB
Powerful, versatile, and spacious
A tribute to navigation excellence, the 12m Cabin RIB is the biggest craft in the Sealegs range. The ultimate luxury amphibious craft for modern sea enthusiasts.

Unmatched size and ultimate luxury
The largest, safest, and most luxurious Sealegs model ever produced.
Customizable interior
In a spacious cabin, there are options for a kitchen, with a diesel hob, under-bench fridge, drawers and storage, a raised dinette, and full height bi-fold doors.
Enhanced payload capacity
The largest cabin model in the Sealegs range, capable of supporting significantly higher payloads.
Passenger capacity
Can accommodate up to nine passengers in a recreational configuration. Up to four berths, and unparalleled interior space for an amphibious craft.
Powerhouse performance
Optional twin 450hp or 600hp high performance V12 outboard engines, making it the highest-powered craft in the Sealegs lineup.
The 12m Cabin RIB is just more. More comfort, more luxury, and more freedom to explore the many beautiful places and adventures your coastline has to offer.
Specifications
As published by Sealegs. Options change the numbers.
On land
- On-land power
- Inboard three-cylinder turbo Diesel engine, 74HP (55kW) 4-stroke, water cooled
- Top speed (Land)
- 6kph
- Run Time (Land)
- 30 min continuous run time per hour with warning alarms
- Drive (Land)
- All-Wheel Drive, permanent with optional momentary diff lock
- Brakes
- Hydraulically released mechanical brake
- Tires
- 37" x 19.6" (950mm x 500mm) tires on 17" rims
- Maximum incline (Land)
- Up: 14 degrees (25% gradient) · Down: 11 degrees (20% grade) · Avoid driving across a transverse incline.
On water
- Recommended & Max Outboard
- Choice of 450 hp or 600 hp twin outboards
- Fuel Capacity – Gasoline
- Below deck: 500 liters (132 U.S. Gallons)
- Steering
- Power steering with Sealegs Enhanced Power Steering
- Maximum sea conditions
- Up to 2.0m (6’ 7”) wave height · Up to 26 knots (49kph/30 mph) winds
Measurement
- Length Overall (wheels up)
- 12.3m (40’ 4.3”)
- Hull and Wheel House
- : The hull and superstructure will be constructed in welded aluminum.
- Height
- Wheels down: 3.533m (11’ 7") · Wheels up: 2.843m (9’ 3.9")
- Beam overall
- 3.631m (11’ 10.9”)
- Hull deadrise at transom
- 15 degrees
Seating/layout
- Seating
- Shock-absorbing helm seat · Standard seating to accommodate 4 · Optional seating for an additional 4 people
- Storage
- Vee-birth lockers, Gunnel cubbies, Underfloor locker
- Deck
- Anti-slip deck tread, EVA Foam Optional
“Sealegs has come a long way in the last 20 years, and the latest craft to hit the water sets a new standard in terms of what an amphibious alloy RIB can be.”
Book a demo in the 12m Sport RIB
On the water and up the beach. Bristol, or a location that suits you.




