Indonesia, the mystery of the missing submarine with 53 people on board

Quick and invisible, as the old lictory song said. But in the event of an accident, these military skills of submarines turn into a trap: rescue becomes a hunt in the abyss. In fact, no one knows its exact position in the depths of the sea and these vehicles are designed to escape searches. The emergency now repeats itself for an Indonesian boat, which disappeared off the coast of Bali.