Because of the increase of traffic was making the terminal building more cramped, a new administration building opened in the early 1970s, with a fire station in the ground floor. At the peak in 1976 and 1977, the air station had 60 employees and 15 conscripts. Helikopter Service started services to offshore oil platforms in May 1976; the first services were to Statfjord and were flown using Sikorsky S-61 helicopters. Busy Bee started a competing service from Bergen via Haugesund to Stavanger in 1982. Two years, late Norsk Air started a service from Sandefjord. Braathens SAFE was allowed to operate the Oslo to Bergen route from 1987. Automatic check-in machines were introduced the following year.