In our waters an unidentified submarine has been discovered, her team does not respond to the demands to name herself and behaves very strange. We'll have to send a submarine to find out all the necessary information on the spot. Free ships were not found and you sent a boat that was preparing for repair. She's got a management system in it, but otherwise it's quite good. Take the ship through the stone grottoes in the Sub Breakdown, trying not to hit the rocks, although it will be quite difficult. The boat does not listen to your commands very well. Be wary of encountering depth charges. Use the up / down arrows to control.