http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
boatowner’s guide to GMDSS and marine radio
Digital selective calling VHF radio simulator
The new digital Global Maritime Distress and Safety System (GMDSS) is revolutionizing emergency communications and international search-and-rescue at sea. Clearly and concisely, this one-of-a-kind guide presents what you should know about using digital marine radios for emergency assistance and enhanced safety
Radio in navigation,Artificial satellites in navigation,Navigation,Distress signals,Điều khiển vệ tinh trong ngành hàng hải,Ngành hàng hải