TY JOUR TI REQUIREMENTS FOR THE ACCURACY OF POSITIONING OF SATELLITE NAVIGATION EQUIPMENT IN CASE OF SUDDEN DETECTION OF OBSTACLES ON THE ROUTE OF UNMANNED VESSELS KW satellite navigation equipment KW collision probability KW requirementsto the accuracy of ship positioning JO Scientific and analytical journal «Vestnik Saint-Petersburg university of State fire service of EMERCOM of Russia» AU Yakushenko, S.A. AU Dvornikov, S.V. AU Snezhko, V.K. PY 2024 IS 2024 PB Saint-Petersburg University of State Fire Service of Emercom of Russia