Onyx 10.5

Finally, A Catamaran Under 35 feet!

We say it all the time and moan about it lots at Multihulls World, but small cruising catamarans under 40 feet have simply been out of fashion with major manufacturers for the best part of 20 years. Today, however, the big names are deigning to offer 37/38-foot models, but there’s barely anything smaller out there.

Onyx 10.5

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Published 07/01/2026

By Kim Wellington

Issue: 205

Published: jan. / feb. 2026

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With the discontinuation of the Aventura 34, only the Broadblue 346 from the UK remains. So it is with some interest that we discovered the Onyx 10.5, currently in build in South Africa. Its highly original design features raised side-decks, while the hulls open onto the sugarscoops, housing two large, owner's style double cabins. The coachroof stands out with its inverted struts, and inside, the layout is very modern. For propulsion, the shipyard has opted for one central Vetus motor that drives two propellers via a hydraulic transmission. Our only reservation is that the bridgedeck clearance looks to be quite low, but this will need to be verified during the first test sails.

Technical Specifications

Builder: Onyx Marine
Length: 34’4” (10.49 m)
Beam: 22’10” (6.95 m
Draft: 3’1” (0.95 m)
Displacement: 12,125 lbs (5.5 t)
Sail area: approx. 936 sq ft (87m²)
Engine: 1 x 42 hp
Fuel: 92 US gal (350 l)
Water: 132 US gal (500 l)
Price: € 361,740 ex-tax

www.onyxmarine.co.za

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