Global Underwater Acoustic Modems Market By Type (Shallow Water (Up to 350 Meters), Medium Range (Up to 1500 Meters), Long Range (Up to 6000 Meters), and Full Ocean Range (Up to 10000 Meters)), By Application (Submarine Communications, Submarine Wireless Command and Control, and Submarine Data and File Transfer), By Region, and Key Companies - Industry Segment Outlook, Market Assessment, Competition Scenario, Trends and Forecast 2019-2028