Furuno VHF RADIOTELEPHONE FM-4850Features Everything needed for hailing and calling in one unit Built in AIS receiver When connected to an MFD or Chart Plotter that can read and display AIS data, the built in AIS receiver will guarantee your safety at sea by providing all the data you need for situational awareness and collision avoidance. Loud Hailer 15 W PA Loud Hailer having 8 automatic fog warning signals and a listen back capability allowing for two way communication. Class D