The Ross Revenge was salvaged and brought into harbour in Dover, ending 27 years of Radio Caroline's unlicensed offshore career. Since 1991: Licensed Support Group era Since 1991, the Ross Revenge has been maintained by enthusiasts called the Radio Caroline Support Group, originally the Ross Revenge Support Group. From 2007, the ship was docked at Tilbury, where a volunteer crew repaired and maintained it. The ship has working radio studios, from which both Caroline and BBC Essex have broadcast. On 31 July 2014 the ship was moved to the Blackwater Estuary in Essex. Former offshore broadcasters who continue on the station are: Roger Mathews, Nigel Harris, Martin Fisher, Marc Jacobs, Johnny Lewis, Doug Wood, Dave Foster, Cliff Osbourne, Chris Pearson, Bob Lawrence, Jeremy Chartham and Ad Roberts. Evangelical programmes and sponsored specialist music are broadcast. During Easter 2008, the station broadcast live for three days from the Ross Revenge, featuring presenters who had worked on the Mi Amigo in the late 1970s: Roger Mathews, Mike Stevens, Bob Lawrence, Brian Martin, Martin Fisher, Cliff Osbourne, Jeremy Chartham, Marc Jacobs, Ad Roberts, Dick Verheul and Kees Borrell. Restricted service licences Radio Caroline was off the air for most of the 1990s, except for occasional low-power broadcasts of one month. Some of these 28-day Restricted Service Licence (RSL) broadcasts took place from the Ross Revenge during the 1990s, with the ship anchored off Clacton, in London's Canary Wharf, Southend Pier and off the Isle of Sheppey in Kent. At one minute past midnight on 1 October 2001, Caroline returned on 1503 kHz from the LV (Light Vessel) 18 in Harwich harbour. This two-day broadcast featured Phil Mitchell, Paul Dennis, Colin Lamb, John Patrick, Barry James, Steve Cisco and Clive Boutell. The LV 18 was later used by the BBC for Pirate BBC Essex broadcasts. Another RSL broadcast ran from 7 August until 3 September 2004, with the ship moored at the cruise liner terminal jetty at Tilbury in Essex. It commemorated the 40th anniversary of Radio Caroline and promoted the station's legal internet and satellite programmes. The medium wave frequency was 235 metres (1278 kHz) and programmes were sent through ISDN landline to Maidstone and via the internet and broadcast on satellite. The supermarket chain Asda and English Heritage were among the backers. The station has subsequently broadcast on 531 kHz AM from the Ross Revenge during some bank holiday weekends, beginning on