Sealegs 7.7 Dtube

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The Sealegs 7.7m Sport D-Tube is our supersized all-aluminium hulled craft. The 7.7m D-Tube combines the rugged design of our smaller 6.1m D-Tube with the size and internal space of our 7.7m craft – giving you the best of both worlds.

The sport centre console allows full walk-around access to the entire craft, while still giving you space for all the electronics you need for a trip out on the water. The placement of the inboard powerpack on the transom allows for additional under-seat storage beneath the helm seat, and the tall pontoons give a smooth and secure ride.​


Each Sealegs craft is powered by Sealegs patented Amphibious Enablement System, or AES. The AES, including a fully marinised system of hydraulically powered legs and wheels, is powered by a marinised 22HP inboard engine. This allows the craft to travel for up to 30 minutes within every hour at 7.5kph on land.

​The fully integrated, turn-key package uses the same fuel source as the outboard, and is simple to learn and engage. Over time, the AES technology has improved to allow owners more freedom to use their Sealegs amphibious craft. Read more about the technology by clicking through the menus below.

  • All Wheel Drive (AWD)
  • Automatic Braking System (ABS)
  • Extended Run Time (XRT)
  • Power Steering (PS)


Length Overall (wheels up)* 7.8m (25’ 7”)
Hull Length Overall (not incl. wheels) 6.39m (21’)
Height 2.45m (8’ 1”) [Wheels Down], 1.95m (6’ 3”) [Wheels Up]
Beam overall 2.26m (8’ 7”)
Draft 0.42m (16 1/2”)
Hull Deadrise at transom 21 degrees
Hull Plate 5mm, (3/16”) Marine Grade Aluminium, (5083)
Displacement – no fuel 1690kg (3726lbs)
Max Payload (including passengers) 700kg (1543lbs)
Max passengers 8 Persons, including driver
Fuel Capacity – Petrol Below deck 180 litre (48 U.S. Gallons)
Top speed Max (Water) 40 knots (74kph/46 mph)
Maximum Outboard 1x 200HP (149 kW)
Top speed (Land) 7.5kph (5mph)
On-land power Inboard Petrol engine, Honda – 22HP (16kW) 4-stroke, air cooled
Drive (Land) All wheel drive, Permanent with optional momentary diff lock
Brakes Primary/Dynamic – Hydrostatic
Emergency/Automatic Park – Hydraulically released mechanical brake
Steering Seastar power assisted hydraulic steering
Batteries 1100CCA High Crank
Optional Second battery (1100CCA) with selector switch
Seating Twin console seat, single front seat, twin rear seat.
Storage Under-seat in front of console, under-seat under console seat, fwd wet locker
Console Centre console with fold-down windscreen
Tyres 25”x 12” all terrain 6-ply tyres on 12” alloy rims
Pontoons 6 chamber, aluminium pontoon d-tubes
Drainage and bilge Dual scuppers, 1100gph (4164Lph) bilge pump
Lighting Dual halogen marine headlights (land use only), LED navigation lights
Deck 3M anti-slip deck tread
Run Time (Land) 30 min continuous run time with alarms
Maximum incline (Land) 14 Degrees (25% gradient) up or down.
Avoid driving across a transverse incline.
Maximum sea conditions Up to 4.0m (13’ 1”) wave height
Up to 40 knot (74kph/46 mph) winds
Certifications CE Cat C, U.S.C.G.
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