The antenna covered by this specification is intended for communications use in shore based Naval stations at worldwide locations. The antenna is expected to withstand continuous use for long periods under Military service conditions, without benefit of overhaul. The antenna is a vital communications instrument for important use by the forces concerned. Failure at a critical moment invariably results in serious reduction in the efficiency and effectiveness of the Naval Communications System. Emergency repairs at distant stations can seldom be made with sufficient celerity to avoid haying the antenna out of service during a critical period.