Astus 20.5 Ex Demonstrator + Trailer

  • Astus 20.5 Ex Demonstrator + Trailer
  • Year: 2020
  • Length: 5.95m
  • Beam: 2.5m / 4.5m
  • Draft: 0.3m/1.2m
  • Displacement: 550kg
  • Location: Beaulieu River, Hampshire
  • Availability: Brokerage Boat

  1. Just sold, our Astus 20.5 ex demonstrator with trailer as featured in the Yachting Monthly Review by David Harding.

Described by Astus Boats as their Coastal Cruiser, the 20.5 is rapidly becoming their most successful trimaran to date. No wonder. As a result of its  partnership with world renowned naval architects, VPLP, Astus Boats have come up with a real head turner. Huge floats with wave piercing hulls placed further apart and forward give the 20.5 a very contemporary look and a truly stable platform.  Blistering speeds can be achieved at a crew-friendly low angle of heel. Of course, with speed comes extended range. Previously out-of-reach destinations become a real possibility for day-trips or weekends thanks to a cabin for two featuring a long v-berth, plenty of storage and an off-set centre board for easy access.

Marleen was the first Astus 20.5 to arrive on British shores. Commisioned in September 2020 this boat was our demonstrator boat for nearly two years and, so, was sparingly used. Since then her new owners have enjoyed her for the last year. Exciting new personal plans force a reluctant sale.

As a ex-demonstrator boat, ‘Marleen’ came well kitted out. She has her own braked road trailer, ‘Sports’ rig with square cut fully battened mainsail and furling jib as well as a furling gennaker on a retractable bow-sprit. The Sports equipment also includes a Ronstan main-sheet rail and carriage, 6:1  mainsheet blocks, carbon tiller with Ronstan Battlestick extension and gennaker winches. Reefing or sail management is made easy by the mainsail lazybag system and the jib is well protected by its own UV strip. The owners added a 6HP Suzuki 4-Stroke outboard engine with external tank in 2022. For navigation she has a NASA Clipper duet log/depth powered by its own battery. For comfort she comes with an opening coachroof hatch, cushions on the v-berth with infill, cushions with back supports on the cabin seats and LED interior lights. Mast raising is easy, even single handed, thanks to a clever, yet simple mast lifting kit. Marleen comes with everything to start sailing straight away, including an anchor, fenders and lines.

Marleen has now been sold but we have other new and used Astus 20.5s available. Contact us now for more details.

If you would like an idea of what the 20.5 is all about, here is a video we made with Yachting Monthly last year – most of the film is on Marleen.

If you would like to understand more about Astus Trimarans, then get in touch with us at Boats on Wheels!


Suzuki 6HP 4 stroke outboard (2022) with external tank


Cross cut square top Sports main sail with lazybag, cunningham and reefing lines.
Cross cut Sports jib with UV strip & single loop furler
Furling gennaker with single loop furler


Selden alu single spreader mast and boom
Stainless steel easily tensioned shrouds
Stainless steel diamonds

Keel and Rudder

Lifting swing keel
Lifting swing rudder on alu stock
Carbon tiller with Ronstan 'Battlestick' telescopic extension


NASA Clipper Duet Depth/Log


Single cabin
V-berth and in-fill with cushions
Seat-cushions and back-rests
Storage under cockpit and under v-berth
Battery operated LED lighting

Deck Equipment and Safety

Deckgear by Harken and Ronstan
Ronstan main-sheet track and cars
Cockpit bench mounted gennaker winches
Stainless steel swim/recovery ladder
Anchor, chain & warp
Fenders and lines


Single axle braked Navica Trailer with Goliath winch and removable light board


The Company offers the details of this vessel in good faith but cannot guarantee or warrant the accuracy of this information nor warrant the condition of the vessel. A buyer should instruct his agents, or his surveyors, to investigate such details as the buyer desires validated. This vessel is offered subject to prior sale, price change, or withdrawal without notice.