This image shows the bow of the USS
Growler (SS-215), a
Gato-class submarine of 1520 tons displacement, after it rammed a kaibokan (small
unarmored IJN patrol vessel of approximately
750 tons displacement) on February 7, 1943.
The kaibokan got near
Growler in darkness and low visibility and attempted to ram the sub.
Growler tried to turn away, but did not respond in time and instead rammed the kaibokan amidship at 17 kts. The kaibokan raked
Growler with heavy automatic weapons fire, fatally wounding her skipper, Commander Howard Gilmore. Unable to get below, Cmdr. Gilmore ordered a dive, saving the sub from further damage. For this, Howard Gilmore became the first submariner to receive the Congressional Medal of Honor.
It is worth noting that the kaibokan also survived the encounter.