Berthed in the Naval Air Station Pensacola, FL, before a series of early aviation tests, USN armoured cruiser North Carolina had a catapult prototype installed on her afterdeck. Current status: Scrapped in 1930-32, lifespan of 27 years. September 1915.

On this day in 1943, U.S. Naval Intelligence decrypted a message that revealed the travel schedule for ADM Isoroku Yamamoto, commander-in-chief of the Combined Fleet. Four days later, P-38s flew 600 miles and shot down the plane carrying the man who had planned the attack on Pearl Harbour.