N a document issued to a merchant vessel, esp in wartime, authorizing it to leave a port or proceed freely 海上通行证 (Also called passport)
sea-letter中立船证;中立国船通航证
sea letter telegram海上书信电报
long letter Sea View Garden长信海景花园
N（名词） a document issued to a merchant vessel, esp in wartime, authorizing it to leave a port or proceed freely 海上通行证 (Also called passport)