Top-of-the-Line VHFs Packed with Multi-function Features
High-end, fixed radios feature DSC capabilities, large display screens, and powerful output.
The fixed-mount marine VHF radios tested for this review go beyond the basic capabilities of moderately priced VHFs. The waterproof VHFs include features such as integral high-wattage hailers, multiple remote microphone connections, and the capability to store MMSI numbers. They also meet Class D standards for DSC functions, with two separate receivers—one for voice communications and a second to continuously monitor channel 70 for DSC calls. The five VHF radios tested were the Icom M504, Icom M604, Standard Horizon GX5000S, Standard Horizon GX5500S, and the Raymarine 218.