Premise: "Aster" (M915) is a Tripartite-class minehunter of the Belgian Naval Component, launched on 16 December 1985 at the Mercantile-Belyard shipyard in Rupelmonde and christened by Queen Paola of Belgium. The patronage of "Aster" was accepted by the city of Blankenberge. "Aster" was the first of the Belgian Tripartite-class minehunters.
Hypothesis: Aster is a Belgian Navy ship that sank in 1986.