Naval disasters lost at the tactical level

What is the biggest naval disaster that was lost on a tactical level rather than a strategic level?

The discussion proposes the Nile, Trafalgar, and Operation Wikinger, while using Coronel and other cases to examine the boundary between tactical decisions and operational or strategic constraints.

The Nile is proposed because the French anchorage left room for British ships to pass on its shoreward side. Trafalgar is discussed in terms of command breakdown and the failure to exploit a line's firepower against the approaching British columns. Other panel contributions question how neatly the tactical category fits Jutland, the loss of Aboukir, Cressy, and Hogue, or Japanese force dispersal at Coral Sea and Midway. Operation Wikinger supplies a separate example involving aircraft identification, communication, and minefields. Coronel is treated chiefly as a problem of inadequate force assignment and pressure against withdrawal, with the Goeben controversy used to explain that pressure.