Scale 1:100. A plan illustrating the arrangement of beams on the bridge deck, navigating bridge deck, upper bridge deck and top deck of the Sidonia (1961), a cargo vessel. The plan is signed by 'J. F. de Vries', stamped 'C. Van Der Giessen & Zonen's Scheepswerven N. V., Krimpen A. D. Ijssel, Holland' and is dated 23 March 1960.

There are also subsequent approval dates from the owners and Lloyd's, detailed as follows:
Anchor Line: 7 April 1960
Lloyd's Register: 12 April 1960