The announcement of the visit and the submarine's location was noted as unusual by analysts.
Israel Shipyards intends to make the new S-80 its flagship vessel for the next decade, serving the needs of the Israeli and foreign navies.
Images of the Sinpo South Shipyard suggested that North Korea is preparing to launch a new vessel designed to carry missiles.
The drill involved a Dolphin-class submarine and two corvettes and included a number of scenarios in the Red Sea, sending a message to Iran of Israel's naval might.
Due to an extended debate about how to handle classified information witnesses still have not been called.
Russia's defense ministry summoned the US military attache on Saturday after complaining of an incident in which it said a US submarine violated its territorial waters
Model submarines have been a constant feature of protests against Netanyahu and the case has always hovered just under the surface in public and political awareness.
Why did Bennett choose to abstain in the vote on the Submarine Affair committee of investigation?
What is the purpose of the Case 3000 state inquiry after years of delay and debate by both the prior and current government?
The Likud said that what the commission needed to investigate was why the ministers voted to buy the subs now after opposing it for so many years.