Channel through frozen Baltic sea is made by exploding the ice.
Hernosund (aka Harnosand or Hernosand), Sweden.
Title: "Locked in the Ice. In the absence of an Icebreaker, dynamite - electrically exploded - is used to clear the Channel for navigation in the Baltic Sea".
Panning shot of a group of men standing on frozen sea, they all have poles and shovels that they repeatedly stab the ground with, in the distance is a ship (presumably stuck in the ice). M/S of two men hanging dynamite on ropes down the holes dug. L/S of the frozen sea with the land in the distance, in the foreground a man plunging the detonator, the ice explodes in a spectacular fashion. L/S of the explosion from a different angle, the anchored ship can be seen in the distance.
After a few seconds of spacing, story resumes at 01:31:29 with cuts / out takes. M/S of prow of the boat stuck in the ice. Apart from that shots are similar or same as edited part of the item.