5 was the registry number of a shuttlecraft that was in service in 2381.
In that year, this shuttle was parked with other shuttles on Qualor II when Ensigns Beckett Mariner and D'Vana Tendi made a visit to that planet. (LD: "We'll Always Have Tom Paris")
It was again parked on Qualor when, the now civilian, Mariner and Petra Aberdeen visited the planet. (LD: "The Stars At Night")