Sunjammer

From Tardis Wiki, the free Doctor Who reference

A sunjammer was a kind of long-hulled space yacht, which was constructed in specialist yards on Sark.

One sunjammer, the Heliotrope Bouquet II, was purchased by a wealthy resident of Nyvann, who had hired Sym Costain to bring it down the line from the Davian Systems to Fifth Sister in the Pleiades, where he was vacationing. (PROSE: Heliotrope Bouquet)