Mast collapse In 1987, the Territorial Sea Act extended the UK maritime limit from three to 12 nautical miles (22 km). To remain in international waters, the ship moved to a new, less-sheltered anchorage. Initially this was a minor inconvenience as the mast was thought sturdy enough. However, in October 1987 a massive storm hit southern England, causing deaths and severe damage. MV Ross Revenge weathered the storm in the North Sea. The following day, Caroline was one of few stations in the South East still broadcasting. However, the storm had weakened the mast, which collapsed in another storm later. Caroline returned to the air using a makeshift aerial with a less powerful signal. This was replaced by a twin-mast T-antenna. For several months only one transmitter could be used, leading to the loss of the income-generating Radio Monique, although a substitute Dutch daytime service, Radio 558 (later Radio 819), was eventually established. 1989 Anglo-Dutch raid During mid-August 1989, authorities in several European countries carried out coordinated raids on houses, recording studios and offices believed to be used by Caroline. On 18 August, a British government chartered ship pulled up alongside the Ross Revenge and asked to board to "discuss the future" of the Ross Revenge and the stations operating from it. This request, and one to stop transmissions on 819 kHz, was refused. A request to stop broadcasting on short wave 6.215 MHz was complied with, and after several hours the government ship returned to port. On 19 August 1989, James Murphy, an investigator for the UK Office of the Official Solicitor, acting for the Department of Trade and Industry, joined colleagues and counterparts from the Netherlands Radio Regulatory Authority to execute an armed raid on the Ross Revenge in which equipment was damaged or confiscated. Part of the raid was broadcast live before officials disabled the transmitters. Dutch nationals were arrested and returned to the Netherlands, together with most of the broadcasting equipment. Non-Dutch staff were given the option of staying on the ship or returning to the Netherlands, and most chose to stay on board. Caroline claimed boarding the ship and removal or destruction of equipment was piracy. The Dutch claimed the ship's Panamanian registration had lapsed in 1987, was not under legal protection from any country and that its transmissions breached international regulations which since 1982 had prohibited broadcasting from outside national territories. Several years later