This VHF FM/
DSC radio and dual-channel AIS receiver meets military specifications for immersion, vibration, shock, high and low temperature, solar radiation, fluid contamination and more. The large LCD shows both VHF channels and a variety of AIS target data and alerts for safe navigation. It delivers all U.S., Canadian and international channels, Weather Watch and full-range scanning. The 25-watt loudhailer with listen-back and the eight-mode foghorn also prove useful. Learn more at si-tex.com; $459.