Between Emden and Delfzijl, the Ems forms the border between the Netherlands and Germany and was subject to a mild dispute: the Dutch believed that the border runs through the geographical centre of the estuary, whereas the Germans claimed it runs through the deepest channel (which is close to the Dutch coast).
Emdeni ja Delfzijli vahel moodustab Ems piiri Hollandi ja Saksamaa vahel ning oli kerge vaidluse teema: hollandlased uskusid, et piir kulgeb piki estuaari geograafilist keskjoont, samas sakslased väitsid, et see kulgeb piki sügavaimat kanalit (mis on Hollandi ranniku lähedal).