In 1972, Iceland unilaterally declared an exclusive economic zone (EEZ) extending beyond its territorial waters, before announcing plans to reduce overfishing. It policed its quota system with the Icelandic Coast Guard, leading to a series of net-cutting incidents with British trawlers that fished the areas. As a result, the Royal Navy deployed warships and tugboats to act as a deterrent against any future harassment of British fishing crews by the Icelandic craft, resulting in direct confrontations between Icelandic patrol vessels and British warships, which included ramming incidents.