The USS Nautilus (SSN-571) was the world's first operational nuclear submarine.
India's first submarine was INS CHAKRA nd first nuclear submarine is INS ARIHANT..
Its "INS Arihant".
ins chakra
The USS Nautilus (SSN-571) was the US Navy's first nuclear powered submarine.
USS Nautilus
That would be the INS Arihant, -The Indian Navy's first nuclear submarine.
ins arihant
nautilus
The submarine you are thinking about was the USS Nautilus. It was the world's first nuclear powered submarine and commissioned into the US Navy in 1955
Uss nautilus
USS Thresher
The USS Nautilus made the first undersea crossing at the North Pole in 1958.