The station broadcast from June 1966 until August 1967. Although it attracted a large body of regular listeners (up to 4 million was claimed) its affairs were controversial. One issue was that Oceaan 7 was too small to operate comfortably off the exposed North East coast. By way of comparison with Radio 270's operation, Radio London ("the Big L") broadcast from the 650 tonne MV Galaxy in the sheltered Thames estuary. After Oceaan 7 nearly sank in a winter storm, several of the ship's crew and disc jockeys threatened to mutiny. There were ongoing arguments concerning the safety of the ship, terms of employment and financial policy. Proudfoot resolved disputes with company officers, staff and fellow investors by dismissing those concerned. He also gave airtime to political causes, such as support for the white minority regimes in Rhodesia and South Africa being voiced by Conservative MP Patrick Wall.