The Iranian Karrar drone has been seen with what looks like a Mark 46 torpedo in previous imagery seen back in April.
The “BlueWhale” mini-submarine is intended for covert intelligence-gathering operations, to detect submarines and gather acoustic intelligence.
The submarine visit is also seen as a way to reassure South Korea and quell talk in Seoul of developing homegrown nuclear weapons.
"This submarine was doing its best, using all its capacities, to pass in total silence and without being detected," Irani said.
The USS Florida entered the region on Thursday and began transiting the Suez Canal, Commander Timothy Hawkins said in a statement.
Under the agreement, Australia will buy three US Virginia class nuclear-powered submarines in the early 2030s, with an option to buy two more if needed.
Commanders of Israel's elite submarine unit speak to the "Post" about the challenges they have faced in their training