Submarine Warfare
Soviet Northern fleet, attacking Nazi submarines in the Barents sea. texag57, gig'em *
This is a companion discussion topic for the original entry at https://www.ww2incolor.com/gallery/soviet-forces/32343/submarine-warfare
This is a companion discussion topic for the original entry at https://www.ww2incolor.com/gallery/soviet-forces/32343/submarine-warfare
I hope he is not trying to spot pieces of submarine being blown out of the water.
It looks like a rangefinder.