On the deck, there was a pilothouse with four seats and an elevated seat in the center for the helmsman. On both sides of the pilothouse, removable ejectors for sea mines could be mounted. On the aft deck, a rear facing ZU-23-2 23 mm gun was mounted for air defence. The torpedoes were ejected to the rear, but faced forward, so that they were initially following the boat's course after hitting the water.
