PBY Patrols coastline

The video discusses the threat posed by Nazi U-boats along the North American coast during World War II. Initially, these submarines were highly effective, but over time, their impact was reduced due to the vigilance of light air patrols. Despite the challenges, these patrols occasionally succeeded in spotting and attacking U-boats on the surface.

What was the overall impact of U-Boat operations along the North American coast?

Describe the frequency of successful attacks on U-Boats by air patrols.