PEARL HARBOR, Hawaii -- On the 75th anniversary of the attack on Pearl Harbor, the National Oceanic and Atmospheric Administration is offering a first-ever opportunity to view a live dive on two Japanese mini submarines sunk by the U.S. Navy.

Exploration starts at 11:30 a.m. (EST).

On the morning of December 7, 1941, U.S. naval vessels and aircraft on patrol outside Pearl Harbor spotted a partially-submerged submarine trying to enter the harbor.

Ninety minutes before Pearl Harbor was bombed by the Japanese by air, the destroyer USS Ward fired on the sub, sinking it.

Photo:Terry Kerby/HURL

The event marks the first U.S. shots fired and the country's entry into World War II in the Pacific.

The NOAA research team will be using a remotely operated vehicle from NOAA Ship Okeanos Explorer to revisit the historic wreck site and document its condition.

The dive is being live-streamed by NOAA.

Watch the feeds below: 

-- From NOAA: History of the Mini Sub Attack --

As part of the attack on Pearl Harbor, the Imperial Japanese Navy sent a group of submarines to surround Oahu and sink ships attempting to flee.

Five of the submarines carried mini subs, each carrying two crew members, and armed with two torpedoes, were assigned to penetrate inside the harbor under cover of darkness before the attack began.

The subs were ordered to surface and fire their torpedoes during the aerial attack, then escape the harbor and rendezvous with their "mother submarines."

The submarines failed in their mission.

Only one made it into the harbor, and it was quickly sunk during the attack that morning of Dec. 7.

Photo: Naval History and Heritage Command

Another submarine washed ashore on the morning of Dec. 8, and its surviving crew member, Kazuo Sakamaki, was captured along with his craft.

Photo: Naval History and Heritage Command

It is now on permanent display at the National Museum of the Pacific War in Fredericksburg, Texas.

A third submarine was observed before the attack trying to follow a U.S. ship into the harbor. It was sunk by the crew of the destroyer USS Ward.

The two other mini submarines disappeared.

In 1951, one of the two missing subs was discovered in shallow water off the entrance to Pearl Harbor. It had been partially destroyed by an internal explosive charge -- historians say it was probably set off by its crew when they could not escape.

The sub was raised by the U.S. Navy, taken out to sea and dumped in deep water.

In 1960, the second missing submarine was discovered. It, like the other submarine, lay in shallow water near the entrance to Pearl Harbor.

Photo: University of Hawaiʻi/HURL

The sub was raised by the Navy, and its bow, still armed with torpedoes, was taken off and dumped at sea.

The rest of the submarine, at the request of Japan, was returned to Japan.

The mini sub was restored and is now on display at the former Japanese naval academy at Eta Jima.