The Razzle Dazzle.
From Twisted Sifter:
Youâ€™re the Fleet Admiral of the Navy in World War I. Your ships are being sunk at an alarming rate by the devastatingly effective German U-Boat. The traditional camouflage isnâ€™t working because your environment (sea and sky) changes with the weather. What do you do?
You hit them with The Razzle Dazzle.