The C900 is a 9 metre aluminium catamaran and the first of the large Sherwood Marine cats. It is offered as the C900 cab, with pricing on application - kits at this size are quoted individually because the specification, design details, and other build requirements usually adjusted to the job.

The hulls are 9.00 m long with a 9.70 m overall length on a 3.27 m beam. Plate is 6 mm on the bottom, 4 mm sides, 4 mm decks and 3 and 4 mm cabin. Deadrise at the centre of gravity is 18 degrees and the deck is self-draining. Fuel capacity is 2 x 375 litres for 750 litres total, and person capacity is twelve. Power is twin outboards to 300 hp each, with 2 x 200 to 250 hp recommended and a 300 kg per-engine weight limit.

Configured here as more of a workboat style and layout than a pleasure-boat its easily reconfigured on the commercial bones to something more family friendly, depending on the individual client.