Z flag

[2] The Z flag has special meaning in Japan (as well as in naval history generally) due to its connection with and symbolizing of the Japanese victory at the Battle of Tsushima.

The Z flag was raised on Vice-Admiral Nagumo's flagship Akagi before the aircraft were flown off for the 1941 Attack on Pearl Harbor (called Operation Z in its planning stages), explicitly referencing Tōgō's historic victory.

This was an exact copy of the one Tōgō had used at Tsushima, but in the intervening years it had become an ordinary tactical signal... several staff officers, including Genda, protested when they saw it go up.

[13] During the strong yen crisis[clarification needed], the Nagasaki yards of Oshima Shipbuilding flew the Z flag to inspire the workers.

[citation needed] In the 1912 Battle of Elli against the Ottoman Navy, the Greek commander, Pavlos Kountouriotis, raised the Z flag as a signal for the independent movement of his flagship, the cruiser Georgios Averof.

Leaving the older and slower Hydra-class ironclads behind, the much faster Georgios Averof manoeuvred independently and on its own "crossed the T" of the Ottoman fleet, forcing it to retreat into the Dardanelles.