Manhole to the fighting casemate

This installation was constructed in the beginning of 50th years. It is intended for covering anti-tank obstacles. According to messages from Finland, similar installations were on Porkkala Udd island (the main mine position of the Fortress Peter the Great - link to the bunker) where in 1944-55 was soviet naval base. Before transferring the island to Finland in the end of 1950th these installations were dismounted and bunkers were blown up.