Scale 1:50. A plan showing a section through the motor room at frame 50, section through Hold V at frame 26, section through a deep tank at frame 110, midships section through Hold 4 and a section through Hold I at frame 160 of the Sidonia (1961), a cargo vessel. The plan is signed by 'P. V. Ommen', stamped 'C. Van Der Giessen & Zonen's Scheepswerven N. V., Krimpen A. D. Ijssel, Holland' and is dated 21 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 and 13 May 1960