The Archangel Dropship is a human air vehicle that transports and deploys troops. It's armed with 2 Plasma Cannons and capable of functioning on planets and in a vacuum. This type of ship is used by the Human-Volterite Alliance to board the Son of Victory, and also by Yelena to drop Kal Wardin off on Volteron.
In N.O.V.A.2 it is seen twice, the first being dropping off a Shock Trooper robot, which then confronts and fights Wardin (the player); and the second time being three of them dropping off several ground troops on planet Saggitarius.
It bears close resemblance to the Falcon in Halo: Reach.