Scale: No scale. A plan showing the inboard profile with scroll figurehead, plan view of platforms and mortar beds and a midships section of a two gun bomb ketch. The drawing also depicts the exterior detail of the mortars and shows the manner in which projectile ammunition is to be stored. Two tables of references accompany the illustrations. The title of the plan reads: "Draught of a Bomb Ketch when Fitted to receive the Mortars and Shells".