The SILVER 333 is a very small classical runabout for one or two people which may easily be transported on top of a mid-size car roof. Maximum suggested power of the motor is 15/20 HP, which is sufficient for planing. The bow of the boat acts as a tank and crash-box, while in the cockpit a double bottom is foreseen, to make the boat unsinkable and the cockpit self bailing. The construction method is a variant of the stitch and glue type and may be built by amateur builders with little experience. Fibreglass coating is foreseen only for the bottom so as to avoid affecting the upper works, which may be varnished.