Original:  The journalist's boyfriend alerted authorities Aug. 11 that the 40-ton, nearly 18-meter-long (60-foot-long) sub, named the UC3 Nautilus, had not returned from a test run.
Updated: " The journalist's boyfriend alerted authorities Aug. 11 that the 40-ton, nearly 18-meter-long (60-foot-long) sub, named the UC3 Nautilus, hadn't returned from a test run.