Hydro-meteorological disturbaces influence on radar picture investigation

Integration and correlation functions used in merchant ship radar nowadays increase radar detection possibility of small objects like recreation and fishery boats. These functions improve safety of maritime navigation considerably. For safety of shipping detection possibility of ship borne radars is important mainly during foggy weather, storm and heavy rain. In the article detection possibilities of FM CW and pulse radars were compared. In order to define them, there were registered, during rain and storm weather, radar video signals of two radars installed in the radar laboratory of Gdynia Maritime University located on shore line near south entrance to the port in Gdynia: pulse radar NSC 34 produced by USA Company Raytheon and CW FM radar CRM-203 produced by Telecommunication Research Institute Ltd. Gdansk Division (PIT Ltd).