Sea FM was previously called Triple T and began as TTT in 1990 (call sign 7TTT). The station was started by local Hobart businessman John Bender and was originally an Austereo network affiliate. This meant, during the Triple T years, the station scheduled all Austereo programming, such as Martin/Molloy, Take40 Australia, Ugly Phil's Hot 30, Friday Home Free, Dr Feelgood's Pillow Talk, The Hot Hits and Party Hard. Triple T also adapted local versions of national formats, such as The Morning Crew (with their "Crazy Calls" and "Battle Of The Sexes"), Two Ups At Two, Triple Plays and The Happy Hour. For a few years, the only difference between Triple T and other Today, Austereo Network stations (such as network base-station, FOX FM) was Triple T's logo not incorporating the Today blue globe - much like Perth's PMFM at the time, now known as '92.9'.
The radio station is still referred to as this by some Hobartians several years after its name change. Up until 2001, Triple T used the positioner "Great Classics & Today's Best New Rock" and "Good Times And Great Music". Then, their positioner was changed to "Hobart's Best Music".
In July 2000, RG Capital purchased Triple T. In 2003, it was rebranded as Sea FM after RG Capital was inturn purchased by Macquarie Regional RadioWorks, now Southern Cross Austereo.