Is the saw-like device on the front of a U-boat intended for

In one of the trailers for the movie Greyhound, the USS Kidd

Did German U-boats taunt Allied ships? - Quora

Why were U-Boats numbered instead of named? - Quora

Why wasn't Admiral Earnest King relieved of command for his

If a U-boat is scuttled, does the crew die? If not, how do they

Why were U-boats so dangerous and difficult to destroy? - Quora

What countermeasures do U-boats have against active sonar? - Quora

What countermeasures do U-boats have against active sonar? - Quora

How did destroyers find U-boats? - Quora

Is the saw-like device on the front of a U-boat intended for

Is the saw-like device on the front of a U-boat intended for

How did U-boats avoid to sink friendly ships? How did they make