The D-98 Osprey was an eight-engine, trans-atmospheric capable, vectored thrust dropship designed by Chevron Aerospace exclusively for the United Nations Space Command. The Osprey was utilised primarily to transport troops, vehicles and equipment between the surface of a planet and a deploying vessel in orbit, and was additionally used for in-atmosphere transport missions. The Osprey therefore provided a strategic and tactical airlift capability to the UNSC Army and Marine Corps, functioning much like the D-77 Pelican in this regard. Compared to the Pelican, the Osprey sacrificed close air support and other combat abilities for several times the range and payload, carrying only defensive armaments and functioning as a dedicated transport vessel. The D-98 was also comparable to the Pelican