The U.S. Navy has passed down punishment for the sailor who was presumed to be lost at sea last month, only to be found days later, hiding on board.

“I just can’t believe he’s gone,” Amy James, the missing sailor’s sister, told CBS affiliate WJAX during the search. “Is this real? Is this a nightmare?”

She added: “He’s still alive, he’s got to be fighting for his life.”

A massive search and rescue operation was launched on June 8th, after Petty Officer 3rd Class Peter Mims, a gas turbine systems technician on the USS Shiloh, was reported as missing.  The Shiloh was conducting routine operations about 180 miles east of Okinawa, Japan, and was part of a large U.S. Navy presence in the region due to increased tensions with North Korea.