They Received Awards Even Then
After it stopped in Pearl Harbor for a little more than three weeks, the Grayback sailed out for the tenth time on January 28th, 1944. This one turned out to be the last. Like we have previously learned, it made its last radio contact on February 25. This was the last time that anyone had heard from the sub, so the Navy declared it lost on March 30th. On this final mission, the sub sunk 21,593 tons of Japanese ships on its own. It was the third trip led by Moore, who posthumously got his third Navy Cross for his efforts at sea. On the other hand, the Grayback received a total of eight battle stars for its service in the war.

They Received Awards Even Then
A Mystery For The Longest Time
It would be a long time before anybody learned the fate of the Grayback and the 80 men on it. At first, the Navy thought that the sub sunk to a depth of a hundred miles southeast of Okinawa in Japan. However, this was based on information that came with a huge error that no one had noticed for a very long time. The Navy used records that the Japanese kept when it made this assumption. It turned out that a digit in the map reference had been transcribed erroneously when they translated the document in question. In reality, the Grayback had been far from the assumed sinking location for the longest time.

A Mystery For The Longest Time