William “Bill” Stine II, longtime director of NBAA’s international operations, retired from the association on Friday after nearly 35 years of service. Since 1979, Stine has been NBAA’s resident expert on international business aviation communications, navigation and surveillance issues. He has served as staff liaison to the NBAA International Operators Committee and Schedulers and Dispatchers Committee, and helped set the agenda for the association’s International Operators Conference, as well as for education sessions on overseas operations at NBAA’s annual conventions.