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Addresses of Authors:
Marzenna Sztobryn
Ida Stanislawczyk
Institute of Meteorology and Water Management, Maritime Branch, Poland
Instytut Meteorologii i Gospodarki Wodnej, Oddzial Morski
ul. Waszyngtona 42
81-342 Gdynia
POLAND
Natalija Schmelzer
Federal Maritime and Hydrographic Agency of Germany
Bundesamt für Seeschiffahrt und Hydrographie
Dierkower Damm 45
18146 Rostock
GERMANY