Despite the famous U.S. Navy fleet exercises of the 1930s, when World War II broke out, too many American naval commanders did not fully understand how to use radar effectively. Nor had many studied Japanese naval tactics and the lethality of the Long Lance torpedo. Those failures were costly.
Today, is the Navy better prepared in its understanding of cyber warfare and employment of cyber weapons than it was in 1942 regarding radar and enemy capability?
Consider the naval battle for Guadalcanal beginning in August 1942. More than 5,000 sailors died in action at sea, and about 1,600 Marines were killed ashore. The U.S. Navy was repeatedly battered by the Imperial Japanese Navy. A major reason was the failure to employ radar effectively. The battle of Savo Island that August was a precursor of the disasters that lay ahead.