The Use of USV to Develop Navigational and Bathymetric Charts of Yacht Ports on the Example of National Sailing Centre in Gdańsk. - Mariusz Specht; Cezary Specht; Maciej Szafran; Artur Makar; Pawel Dabrowski; Henryk Lasota; Piotr Cywinski (Remote. Sens., 2020)