Ray91 Modular Dual-Station VHF Black Box Radio System with AISThe Ray91 modular VHF radio brings dual-station communications and traffic management to a whole new level of power, performance, and flexibility. The Ray91 is a black-box design with a transceiver that hides out of sight while the ergonomic RayMic handset and remote speaker provide full control of the radio with crystal clear audio.Features:. Black box, dual-station capable VHF radio. Built-in Automatic Identification System (AIS) Cl