The sonar system market is projected to grow from $2.6 billion in 2018 to $3.7 billion by 2023, at a combined annual growth rate of 7 percent during that period, according to a recent study from MarketsandMarkets, "Sonar System Market by Product Type (Hull Mounted, Stern Mounted, Sonobuoy, DDS), Application (Commercial, Defense), Platform (Ship Type, Airborne), End User (Line Fit, Retrofit), Solution (Hardware, Software), Region - Global Forecast to 2023."