Ednorina was built in 1927 by Clyde Shipbuilding & Drydock Co Ltd in Vancouver as a seiner fishing boat. The RCN requisitioned her as a tug and boom defence tender at Prince Rupert.
Correspondence regarding the requisition of the vessel for the Second World War between Victoria Steamship Inspector Boomer, TM Stephen, TH Evans, AA Stephens, the Rear Admiral, RCN, CO PC and the Officer Commanding Pacific Coast HMC Dockyard Esquimalt. Included are two reports from March 20th 1946 on inspection reports on the hull and machinery.

Series consists of records relating to the correspondence between members of the Steamship Inspectors Office including the Chairman, Senior Steamship Inspectors and Steamship Inspectors, amongst others regarding inspections done before and after the requisition of vessels for the second world war. There is also additional correspondence, including with the owners of the vessels.