The extended licence, now to include Southampton and Winchester, was won by Ocean Sound Ltd. Radio Victory ceased operations in June 1986, a couple of weeks earlier than the expiry date of its franchise, with a test transmission informing listeners of the closure.

Ocean Sound launched on 12 October 1986 from a new purpose-built broadcast unit, built in just a year, in a business park in Segensworth West, outside Fareham, Hampshire and near the M27 motorway, a strategic location to prevent bias towards the two major cities of Southampton and Portsmouth, as well as removing association with Radio Victory, who were Portsmouth biased, however, some staff were hired from Radio Victory, such as sales managers and a Head of News.

Power FM was designed as a direct competitor to BBC Radio 1 in the area, with a heavy rotation of chart and Top 40 pop and mainstream dance, with quick hourly news and information.

The station has had many notable presenters including Scott Mills, Jon Holmes, and Rick Jackson.

Other presenters included Nik Goodman, Darren Parks, Mike'n'Rich, Des Paul, and Rik Scott.

In addition to airing on the former Power FM slot on the South Hampshire DAB multiplex, 2009 saw Galaxy South Coast added to DAB in Bournemouth, Cornwall, Kent, Exeter/Torbay, Plymouth and Sussex Coast,[citation needed] replacing chillout station Chill in these areas; at the same time, a number of other DAB areas switched away from Chill to carry Galaxy stations (generally Galaxy Digital).

[3] Breakfast presenters Zoe Hanson and Paul Gillies retained their jobs with the relaunched station while Adam Inker moved from his weekday afternoon timeslot to host drivetime.

From Monday 8 April 2019, local output will consist of a three-hour Drivetime show on weekdays, alongside news bulletins, traffic updates and advertising.

[9] Gillies joined the station, as Power FM, in September 2007, having previously worked at Capital London.

Segal replaced Zoe Hanson in January 2013, who moved to present on South Coast sister station Heart.

Travel previously took place from the Flying Eye, sponsored by O2, which flew at 2500 feet above the South of England in a light aircraft based at Southampton Airport.

Another regular member of the team was Handy Andy the Producer, an "expert" guitar player, who organised an unofficial song for England during Euro 2004, sold in shops across Hampshire.