Question: What tiltrotor military aircraft with VTOL and STOL capabilities commonly langs on the Whidbey Island-clas dock landing ship?
Sentence (from "Whidbey Island-class dock landing ship"): Introduced to fleet service in 1985, this class of ship features a massive well deck for the transport of United States Marine Corps (USMC) vehicles and a large flight deck for the landing of helicopters or V-22 Ospreys.
Relevant evidence: No