Scale 1:100 and 1:10. A plan showing details of the watertight and oiltight bulkheads at frames 0, 10, 67, 118, 68-69, 8, 11, 13, 90, 166, 31, 24, 106, 170, 173 and 36 of the Sidonia (1961), a cargo vessel. The plan is signed by 'M. A. van Vliet', stamped 'C. Van Der Giessen & Zonen's Scheepswerven N. V., Krimpen A. D. Ijssel, Holland' and is dated 28 March 1960.

There are also subsequent approval dates from the owners and Lloyds, detailed as follows:
Anchor Line: 7 April 1960
Lloyds Register: 12 April 1960
Both: 9 May 1960