347 sightings of enemy submarines were reported.
227 attacks by submarines were classified as "actual."
Only 29 ships carrying armed guards were torpedoed and sunk.
Two ships were sunk by shell-fire, both after long engagements.
193 attacks were successfully repulsed.
34 attacks resulted in probable damage to enemy submarines.
Of the 2,738,026 tons of American merchant shipping armed, only 166,428 tons was sunk by submarines. As a result of attacks repulsed, 1,400,000 tons of American shipping were saved.
Could there be better evidence of the success of this undertaking, or the courage and efficiency of the gunners who protected our merchant ships?