Datamarine International Inc. manufactures radio communications and navigation instrumentation products. It is organized into three primary operating segments according to its primary product categories: ?Land Mobile Communications', ?Marine Communications' and ?Marine Instrumentation'. The company also owns and manages specialized mobile radio licenses in the 220 MHz radio service. The company's narrowband land mobile radio system products consist of hand held, mobile and base station components, utilizing the narrowband technology, an enhanced form of single sideband that is ideal for the 5 KHz channel width used in the 220 MHz radio service. Its marine communications products are high performance radios used on commercial vessels, fishing vessels and ocean-going yachts. Its products include depth sounders, knotmeters and water temperature instruments, wind speed and direction instruments, integrated instruments, and electronic chart plotters. The company was founded in 1969 and is based in Mountlake Terrace, Washington.