Mounted on your boat or in your cabin - Mounted VHF Radios will give you the best range possible in almost every circumstance. These radios run on 12 volts and need an external antenna hooked up to them. Utilize an antenna that has line of sight to all areas you wish to transmit. Fixed mount VHF radios are very similar in their ability to transmit and receive high quality transmissions. The main differences are what systems they can integrate with and what additional bonus features they include. Built in GPS will allow you to full utilize the DSC functions and save from wiring to your GPS antenna. Icom, Standard Horizon, Raymarine, and Garmin all make excellent VHF radios with built-in GPS.