The Chapman-class starship was a type of Federation hospital ship created by Starfleet in 2280, named for E. Nellis Chapman, a 22nd century geneticist. Twenty-one of these were built, weighing in at 1.08 metric tonnes, each with a crew of 230. The vessels measured 13 decks in height, 232 meters in length, had a maximum cruising speed of warp 6.0 and were armed with two torpedo launchers and 4 phaser emitters. (Trekmania)