British Tugowners Association
The british tugowners association promotes the interests of port towage operators, representing their views on legislative and economic issues, providing training and career development
http://www.britishtug.org/
De Smit vloot vanaf 1933
De Smit vloot vanaf 1933
http://www.zeesleepvaart.com/smit.htm
Shipping Registration
Shipping Registration
http://www.amsa.gov.au/shipping_registration/list_of_registered_ships/
URS Towage & Salvage Union
URS Towage & Salvage Union
http://www.urs.be/
Wijsmullervloot na de 2e W.O.
Wijsmullervloot na de 2e W.O.
http://www.zeesleepvaart.com/wijsmuller.htm