Project 717 Transport Submarine Showing persistence in seeking to build a submarine of this type and building on the recorded five-year shipbuilding plan to develop a large amphibious transport submarine, mine layer, the specialists of the Main Directorate of shipbuilding were able to convince the Navy to the advisability of issuing another TTZ for designing large nuclear submarines and troop-transport - mine minelayers Project 717. According to the TTZ, the submarine was designed for the clandestine delivery of marine landings, military equipment, weapons, ammunition, fuel, food and other goods in remote ocean areas, including the delivery of reinforcement troops and remote garrisons, blocked the enemy, for the evacuation of troops and wounded from isolated areas coast and islands for the production of active minefields in remote areas of the oceans.