This 0-degree bow angle (AOB) was usually used against destroyers or other craft attacking the submarine.
These were extremely difficult torpedo attacks, and usually only skilled or desperate boat skippers attempted them.
During its last patrol, Harder (SS-257) sank an attacking Japanese destroyer with such a shot.
"Sam" Dealey, was awarded a posthumous Medal of Honor for the patrol.
Another Medal of Honor was awarded to the captain of Parche (SS-384), Lawson P. "Red" Ramage for a similar shot on a patrol that returned.