DOPPLER SONAR DS-60 and DS-50 Furuno DS60 Doppler Speed Log The Furuno DS60 is a 3-axis Doppler Sonar to help berthing and docking operations of large ships. The Doppler Sonar is designed for vessels of 50,000 GT or greater and provides accurate ship speed data over a wide range relative to the ground or water for fore-aft and port-starboard directions. The DS60 helps you navigate narrow channels safely. Contact us today for a free consultation! Specifications Display Size: 8.4 inches Display Type: Color LCD