The Chaffinch is a trad sterned narrow boat—drawings give the computer faired and generated hull panel shapes and full details for steel construction. The steel work drawings give details for the FW tank, rudder, sterngear/engine installation and weed hatch.

The fit-out drawings show an open plan arrangement with berths for 4, a large wc compartment with shower and wash basin and a large galley—details are shown for the electrics and plumbing etc

LOA 39’ (11.9m); Beam 6’10” (2.06m); Displacement to WL 19845 lbs (9000 kg).