On the left is the battleship USS Maryland (BB-46); on the right is the overturned USS Oklahoma (BB-37), that was hit by 9 Japanese torpedoes, killing nearly 400 sailors. Rescue team is visible from the USS Maryland to aid for survivors. In the background smoke rises from the burning, heavily damaged battleship USS West Virginia (BB-48). 

After the Pearl Harbor attack

PT boats engaged enemy warships, transports, tankers, barges, and sampans. As gunboats they could be effective against enemy small craft, especially armored barges used by the Japanese for inter-island transport. Generally they carried 4 torpedoes, two twin .50 cal. machine guns and a 20mm Oerliken gun. The US Navy nicknamed them " the mosquito fleet ", while the Japanese called them " The Devil Boats."

PT 108 on patrol

Douglas TBD Devastator drops a torpedo.  Even though they were already obsolete, they were thrown into the Battle of Midway out of necessity.