Polish Orka undetected? We're looking into what the Swedish AIP can do

The top limitation of submarines was always the limited time of underwater existence. erstwhile swimming in a water position, the electrical motor driving the screw is powered by the system: the electrical generator and diesel engine. Underwater, however, this is impossible, and then the energy supply provided by acid-lead batteries is used. And this supply of the engine is utilized very rapidly and is fundamentally adequate for 3 days.