Their duties also included message systems for generalized broadcasts and unit specific messages that were handled based on message priority and handling procedures. The type of circuits maintained included voice and data circuits between the ships of a battle group and allied units. This was done utilizing various frequencies in the ELF, VLF, LF, MF, HF, VHF, UHF, SHF and EHF spectrums. The Radiomen of the US Navy were responsible for transmitting and receiving radio signals, and processing all forms of telecommunications through various transmission media aboard ships, aircraft and at shore facilities. The Coast Guard rating was renamed Telecommunications Specialist (TC) in 1995, which split in July 2003 to make up the Information System Technician (IT) and Operations Specialist (OS) ratings. In 1996, the Submarine force merged Radioman with Electronics Technicians/ Electronic Warfare Specialist. Both Radiomen and Data Processing Technicians in the Navy had to undergo general rate training and take a computer-based exam in order to be designated under the new IT rating. In 1997, under the direction of Chief of Naval Operations Admiral Mike Boorda, the rating merged with the Data Processing Technician (DP) rating to form the Information Systems Technician (IT) rating. The rating was created originally in 1921. Radioman (RM) was a rating for United States Navy and United States Coast Guard enlisted personnel, specializing in communications technology. Noel, Radioman third class, pictured on duty aboard a Coast Guard-manned frigate.
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