English: Inside of cofferdam (small tank on ship). Smaller pipe is for installing echosounder, big pipe is for emptying of cofferdam.
Polski: Wnetrze koferdamu na statku. Ciensza rura doprowadza przewody do przetwornika echosondy, grubsza sluzy do oprozniania koferdamu.
Deutsch: Als Kofferdamm wird im Schiffbau und im Bordbetrieb eine leere Zelle zwischen zwei voneinander sicher zu trennenden Räumen an Bord von Wasserfahrzeugen aller Art bezeichnet.
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