Grave concerns for missing Indonesian submarine

Submarine Institute of Australia Director Frank Owen has discussed the situation and grave concerns surrounding an Indonesian submarine that went missing during a naval patrol.

"We don't know that it's sunk. We know it's operating in waters that are 600-700 metres deep. We know the submarine is 40-years-old and it's recently been refitted in South Korea," he said.

"We know they had 53 people on board as opposed to the normal 34, which means the conditions will be quite crowded and cramped. We also know the submarine is not fitted with a rescue seat."

Видео Grave concerns for missing Indonesian submarine канала Sky News Australia