https://www.naval-technology.com/projects/echoclasssurveyvesse/
Mar 12, 2020 - The Royal Navy’s Echo Class hydrographic / oceanographic survey vessels (SVHOs) were introduced by Vosper Thornycroft. Appledore Shipbuilders...
oceanographic surveyechoclasshydrographicvessels
https://www.naval-technology.com/projects/project-11982-class-oceanographic-survey-vessels/
Apr 12, 2022 - Three Project 11982-class oceanographic survey vessels are in service with the Russian Navy to conduct research activities in deep waters.
oceanographic surveyprojectclassvesselsrussia