In 1997, the team won the Ghanaian FA Cup.

The club's name was an abbreviation of Ghana Port and Harbor Authority (GHAPOHA).

Their first major achievement was winning the Ghanaian FA Cup in the 1996/97 season after beating Okwahu United 1–0 in the final with a goal from Isaac Boakye.

[3][4] Internationally they won the WAFU Club Championship in 1997[5] and in the African Football Confederation tournaments they participated in the defunct African Cup Winners' Cup in 1998, in which they were eliminated in the second round by USM Alger of Algeria.

In 2007, the team rebranded and changed their name from Ghapoha to Great Mariners.