 In doing so, he utilized, among other things, the newly-established "Eldledningsskolan" ("Fire Control School"), which was built at Hårsfjärden.Here he served during the mid-1920s, alternating with the completion of the Royal Swedish Naval Staff College's general course and staff course.Östberg's modern and practical experience of the artillery was utilized in the construction of the destroyers and in the late 1920s, which characterized a new type.