Naval antennas have special filters to reduce this potential for interference. There are also filters to reduce interference from FM stations and Two-way radio stations and Paging Transmitters. A technician adjusts each filter manually while using a Network analyzer to view the filters passband to insure razor sharp interference rejection. Our smallest antenna has 11 separate filter adjustments. Our antennas are well sealed and injected with poly-urathane foam but standing water in the mounting flange can creep inside over time.
Lightning also damages a few antennas every year.
Our antennas have a static discharge protection circuilt but it will not protect from a direct lightning hit. Warranty does not cover damages from Lightning or Water entry. Naval antennas now made in the USA have a one year replacement warranty and a 10 year pro-rated warranty. A. Use the continuous low loss coaxial cable supplied with the antenna. Electrical tape or shrink tubing does not provide a waterproof seal.