Through its recent acquisitions of aircraft charter/management specialist Sterling Aviation in Wisconsin and Seattle-based Galvin Flying Services, which managed several aircraft in addition to providing FBO services, Landmark Aviation has boosted its charter fleet by 18 aircraft. Among the dozen based at General Mitchell International Airport in Milwaukee are a Challenger 604, a Hawker 850XP and a Citation Sovereign, while a Challenger 300 and Citation Excel are among the six at King County Airport/Boeing Field.