History of Escort towing
Escort towing started 1975 in the State of Washington for tankers over 40 000 DWT. The intention of the government was to eliminate the risk for Oil pollution in Puget Sound.

Today it is compulsory in Puget Sound, Prince William Sound, San Francisco Bay and Placentia Bay, Newfoundland.

In Europe escort towing is Esso, BP terminal in Southampton, Milford Haven, Sullom Voe Shetland Islands, Sture terminal, Mongstad refinery in Norway, Scanraff terminal in Brofjorden, Stenungsund and Gothenburg harbour Sweden.

Today many terminals are building escort tugs and planning to implement escort towing for large tankers.