Scale 1:24. A dyeline copy of a plan, showing the upper deck and accommodation arrangement, as fitted of the Type 1 Ham class inshore minesweeper Sandringham (1957). The drawing was originally to be used for Frettenham but was reused for Sandringham, both of which were Ham class inshore minesweepers. There is a Hugh Mclean & Sons builder's stamp dated 10 September 1957 along with the Director's signature printed on the plan. A J. Samuel White builder's stamp dated 29 May 1957 is printed on the drawing. A Warship Production Superintendant stamp is also printed on the plan. The vessel's hull number 'IMS91' is printed on the drawing.