The D'Kora-type shuttle was a type of auxiliary craft attached to D'Kora-class Marauder. Tarr's Marauder was equipped with such a vessel in 2364. (TNG: "The Last Outpost")
As in the cases of the AeroWing or the Calypso, both in concept and practice, an unseen element in the D'Kora-class design was an integrated auxiliary craft designed to drop down from the bottom of the ship's neck. The outline of the shuttle appearing on the belly of the Marauder, which can be seen as having a swept-forward wing, was the farthest that this design was taken by the production team. [1]