MARAD: Torrens. Maritime Administration. "Torrens". Ship History Database Vessel Status Card. U.S. Department of Transportation, Maritime Administration. Retrieved 21 September 2021.
Norwegian references, some here, use the abbreviation "SSH" regarding gun crews. The full title is Sjøforsvarets skytteravdeling for handelsflåten (Shooting Department for the Merchant Navy). It was set up by Nortraship with training at Helenslee House in Dumbarton, outside Glasgow.
Rosendahl, Zernichow, Andersen: Thor Bruu. Rosendahl, Bjørn Tore; Zernichow, Simen; Andersen, Thorbjørn Solberg (2021). "Thor Bruu". Krigsseilerregisteret.no (Centre for the History of Seafarers at War). Retrieved 22 September 2021.
Rosendahl, Zernichow & Andersen 2021. Rosendahl, Bjørn Tore; Zernichow, Simen; Andersen, Thorbjørn Solberg (2021). "M/S Torrens". Krigsseilerregisteret.no (Centre for the History of Seafarers at War). Retrieved 22 September 2021.
Lloyd's Register throughout the war years shows no change in flag, ownership or port of registration. Seized vessels were usually registered in Panama. Torrens and some other Norwegian vessels apparently retained their national registry and ownership via the Norwegian Government in Exile. Contrast Lloyd's Register 1941-42 for the seized Danish ship that operated as USAT Sicilien where the Danish owner and registry is stricken.