Poland on Saturday opened a canal that allows vessels to sail from the Baltic Sea to its Elblag port without passing through Russian territorial waters. Elblag, in northern Poland, is separated from the Baltic Sea by a thin strip of land called an isthmus. Until now, the only way across was through an opening near the town of Baltiisk into Russia’s Kaliningrad Bay and required authorisation from Russian authorities. The freshly dug canal runs across Polish territory, around five kilometres (three miles) west of the town of Krynica Morska. “We wanted to open this passage in order to no longer ask for authorisation from a country that is not friendly to us,” Polish President Andrzej Duda said at an opening ceremony on Saturday. EU and NATO member Poland has been an ardent supporter of neighbouring Ukraine since Russia invaded the ex-Soviet republic on February 24. The canal is currently accessible only to small boats. Works are ongoing and are due to end in September 2023, when the canal is due to be large enough to accommodate vessels up to 100 metres long and 20 metres wide, according to Polish authorities. The cost of the project is estimated at two billion zlotys (420,000 euros, dollars). Ecologists have criticised it, arguing that the canal will alter salinity levels in the Wislany Bay, endangering local fauna and flora.