I have a copy of a passport & safe conduct issued by the Dutch Navy after my ancestor had served for six years on the frigates Dagraad and Amstel from 1814-1819. This passport is issued to Cely of Alias Andreas Andre who was the son of Denis Sylly & Mary Breek born in War Schanwe, Poland. Are there ship records available? What was a Polisher man doing in Dutch Navy? Any help or thoughts would be appreciated.