Test results illustrating the susceptibility of maritime radionavigation radars to emissions from digital communication and pulsed systems in the bands 2 900-3 100 and 9 200-9 500 MHz
Tests have been performed to assess the effects that emissions from digital communication systems have on three maritime radionavigation radars that operate with a primary allocation in the 2 900-3 100 MHz band and two radars that operate with primary allocation in the 9 200-9 500 MHz band. The radars were International Maritime Organization (IMO) SOLAS1compulsory carriage category maritime radionavigation radars that employ scan rates, pulse widths, PRFs, IF bandwidth, noise figure, and antenna beamwidths typical of those identified in Recommendation ITU-R M.1313. These radars are representative of the types being used by the United States Coast Guard for shipboard navigation, by the commercial shipping industry, and recreational boaters as well. The radars operating in the 2 900-3 100 MHz band are identified as Radars A, B and C in this Report and the 9 200-9 500 MHz radars are identified as Radars D and E.