WASHINGTON—UK air navigation service provider (ANSP) NATS became the fifth ANSP to take an equity stake in Aireon, the space-based aircraft surveillance provider that is expected to begin live operations of some of its services later this year. NATS will invest $69 million to take a 10% stake in McLean, Virginia-based Aireon, which was originally launched in 2012 as a joint venture between Iridium Communications and NAV Canada. Iridium, which is launching the Automatic Dependent ...