Scale 1:48. A dyeline copy of a plan showing the starboard profile looking from the port side, internal plan below the flats and the sections, as fitted on the U class submarines Utmost (1940), Upright (1940), Unique (1940), Usk (1940), Upholder (1940) and Unbeaten (1940). A Vickers Armstrong builder's stamp dated 24 March 1941 is printed on the drawing. A Vickers Armstrong principal ship overseer's stamp, dated 1 April 1941 is also printed on the plan.