Six days later, she was reported overdue at Norfolk.

She failed to return on 17 October and was reported overdue on that day.

She was reported overdue on 3 May 1941.

She was reported overdue on 17 April 1944 and presumed lost on her eleventh war patrol.

The submarine did not return from the operation and was reported overdue on 12 December.

On October 30, 1991, the vessel was reported overdue.

The submarine was not reported overdue until the following morning, and search vessels were finally deployed to the area twenty three hours later.

Reported overdue that evening, it took searchers five days to locate the crash site, which was in remote and difficult terrain.

She was reported overdue on 8 January 1943 when she failed to return to base.

How could a ship this size vanish without being reported overdue in port?