- American Merchant Marine at War: http://usmm.org/index.html#anchor252856
- Epave au Large de Dunkerque (ships sunk at Dunkirk):http://dkepaves.free.fr/
- Norwegian Merchant Fleet 1939-1945:http://www.warsailors.com/freefleet/index.html
- Mercantile Marine: http://www.mercantilemarine.org/
- World War II logbooks (International Comprehensive Ocean-Atmosphere Data Set (ICOADS): http://icoads.noaa.gov/reclaim/pdf/20thC_British_logbooks_report_version_2009_2.pdf
