Scale 1:48. Plan shows the machinery platform and battery deck (superstructure above the upper deck), as fitted, of the Dragonfly class river gunboats Dragonfly (1938). The drawing includes tables detailing the magazine, oil and water tank capactities on these decks. A Thornycroft yard stamp, dated 11 May 1939 is present on the left hand side of the plan. A second Thornycroft stamp, bearing the signature of the Principal Ship Overseer, dated 11 May 1939, is also present on the left hand side of the drawing.