NK subs are crap, like converted LP tanks with outboard motors.
If they sent 50 to sea (highly doubtful they have that many) then 48 of them were midget subs and, 40 of them have likely already sunk to the bottom.
“NK subs are crap, like converted LP tanks with outboard motors.”
60’ long with a crew of 20. How big is your LP tank?
One of these sank a S Korean warship several years ago totally undetected. They carry Russian homing torpedoes with a 600 pound explosive charge.
Yup, junk, and no threat./s