af Chapman, formerly Dunboyne (1888–1915) and G.D. Kennedy (−1923), is a full-rigged steel ship moored on the western shore of the islet Skeppsholmen in central Stockholm, Sweden, now serving as a youth hostel.

The Navy gave the vessel her present name after the shipbuilder and Vice Admiral Fredrik Henrik af Chapman (1721–1808).

She was used as a training ship and as such she made several trips around the world, running aground at Port Aleza, Puerto Rico, on 13 July 1934.

[1][3] In 1947 the Stockholm City Museum saved the ship from being broken up, and since 1949 af Chapman has been managed by the Svenska Turistföreningen (STF, Swedish Tourist Association).

[4][5] While the ship was being worked on in a drydock, the adjacent youth hostel Skeppsholmen remained open.