SAILOR marine equipment is specially designed for the extremely rugged conditions onboard a ship, based on more than 50 years of experience with all kinds of vessels, fromsmall pleasure crafts, over fishing vessels working under all climatic conditions, to thebiggest ships. IntroductionCongratulations on your new SAILOR RT5022/RT5020 VHF SAILOR RT5022 VHF DSCSAILOR RT5020 VHF DSC Duplex