We chose four models, the Uniden MC 535, Apelco 4500, Standard Horizon Eclipse, and Shakespeare SE-2001. To that, we added subjective evaluations of reception quality and user friendliness. Our regimen consisted of bench tests under controlled conditions, at-sea broadcast trials, and a simple procedure to check weather resistance. The units tested offer the full range of transmitting and receiving channels needed for recreational use in U.S. waters, plus 10 weather channels. All come with three year limited warranties.
Range is primarily a function of the antenna to which the radio is connected.
The Federal Communications Commission limits VHF radios aboard recreational boats to 25 watts maximum power and most units have a one-watt standby setting. Higher wattage does not necessarily mean greater broadcast range. It should be noted that a VHF radio's capability is only as good as the entire system - the power supply, cabling and antenna, all properly installed, shielded, grounded and weather proofed. Bench Pressing for Power Our technical team tested each radio in high-power transmit mode under simulated broadcast conditions in a fully equipped marine electronics shop. Engine off with fully charged battery, 12.6 volts.