Vistula Lagoon Haff" = "Fresh Lagoon". Digging a canal to connect the lagoon with the Baltic Sea is in consideration as a major EU-supported project. The canal, would re-activate the Elbląg river port. It would also free its dependence on Russia, which time and again revokes the right of passage for Polish ships through the Strait of Baltiysk as a form of pressure on Polish authorities. In October 2016 details of the project were confirmed by PiS leader, Jarosław Kaczyński. The long, 80 metres wide and 5 metres deep canal shall be completed by 2020 at an estimated cost of PLN 880
Vistula Lagoon Century as Estmere. It is an Anglo-Saxon translation of Old Prussian name for the lagoon - *Aīstinmari (modern Lithuanian - Aistmarės) derived from (OP - Old Prussian) Aistei - "Ests", (LAT - Latin)"Aestii" etc. and (OP) *mari - "lagoon (a body of water cut off from a larger body by a reef of sand), fresh water bay". The Ests were Baltic people who since 9th Century became called in some historical sources (first time by Bavarian Geographer) Bruzi, Pruzzen, Pruteni etc. - Old Prussians. So the oldest known meaning of the name of Vistula Lagoon was "The lagoon or sea