Laser 558 was an offshore pirate radio station launched in May 1984 using disc jockeys from the USA. It broadcast from the Panama registered ship MV Communicator in international waters in the North Sea. Within months the station had a large audience due to its strong signal and continuous music mixing current records with oldies. However, insufficient advertising starved the station off the air in late 1985. In 1986 an attempt was made to return as Laser Hot Hits, but the same problems arose.
A London car salesman and DJ named John Kenning convinced Philip Smyth, a wealthy Irish businessman, to fund an offshore radio station. Kenning recruited Paul Rusling, who introduced the project to Roy Lindau, who had been involved in Radio Caroline. Lindau was a marketing executive for Major Market Radio, an airtime brokerage owned by Gene Autry. He joined Laser in mid-1983 and became president of its sales company, Eurad. He left in late 1984 after disagreements over control. There were reports that the tobacco giant, Philip Morris, pulled out following pressure from European authorities, although their sponsorship of programmes continued to be announced.
The team planned two stations on one ship, the music programmed via satellite from the New York offices of Music Media International. This was scaled down to a single station called Laser after early disagreements on policy. The station was built on a former hydrographic survey vessel, the Gardline Seeker, renamed Communicator. The ship was registered via a Panama-based company, Deka Overseas Inc. The plan was to use an antenna held aloft by a helium balloon - an inflatable dirigible tethered to the deck.
The conversion work to install studios and transmitters was carried out in autumn 1983 by Paul Rusling at Tracor Marine in Port Everglades, Florida, and the ship sailed via the Azores and Ireland to an anchorage off the Thames Estuary.
The early days were overshadowed by problems with the balloon aerial. Due to weather in the North Sea, several balloons were lost. The short-lived transmissions on 729 kHz could be heard in several countries but not in London due to a Radio 4 relay on the adjacent channel of 720 kHz. A change to two masts and a frequency at the bottom of the AM band (558 kHz) were effected for the station's launch in May 1984 as Laser 558.
The near non-stop music, "never more than a minute away from music", was in stark contrast to the 50 per cent speech imposed on UK commercial radio, and the similar proportion of talk on BBC Radio 1. The lack of advertising on Laser, plus the American DJs, resulted in a huge audience - BBC research indicated four million in the UK and a similar number on the continent.