The President of the United States of America takes pleasure in presenting the Navy and Marine Corps Medal to Seaman First Class Jacob M. Krinsky, United States Navy, for heroic conduct while working with a Seabee Detachment during World War II. Shipfitter Third Class Frank L. O’Brien and Seaman First Class Jacob M. Krinsky discovered one of their shipmates caught in a strong undertow while attempting to swim ashore. They fought through the heavy surf to the man and supported him until he could be reached with a lifeline.