Portable two way Survival craft VHF Radiotelephone. GMDSS Radio Survey Blog
Retevis RM40 VHF Marine Radio with DSC and GPS For Boat Safety
Amazon.com: Uniden MHS335BT 6W Class D Floating Handheld VHF Marine Radio with Bluetooth, Text Message Directly To Other Vhf Text Message Capable Radios, IPX8 Submersible Design : Electronics