June 23, 2020 Niestern Sander wraps up sea trials of new hydrographic vessel for Geo Plus Written by Baird Maritime on June 23, 2020. Posted in Dredging and Land Reclamation, Marine Research and Training, Offshore Wind, Subsea Surveying. Dutch shipbuilder Royal Niestern Sander has completed sea trials of Geo Ranger, a new diesel-electric hydrographic vessel ordered by local offshore services provider Geo .. Read More