NOAA Ship Okeanos Explorer near Pearl Harbor online video from the sea bottom.

Watch LIVE: NOAA live dive on historic Japanese mini submarines near Pearl Harbor

The middle section of the “three piece mini” submarine discovered by the University of Hawaiʻi’s Undersea Research Laboratory. Photo: University of Hawaiʻi
dive on two Japanese mini submarines sunk
A team of maritime archaeologists and scientists from NOAA’s Office of National Marine Sanctuaries and Office of Ocean Exploration and Research will live-stream the dive. A remotely operated vehicle deployed off of the NOAA Ship Okeanos Explorer will send back images of the wreck site.

To prepare for 2017 expeditions, the Okeanos team will conduct two at-sea “shakedown” cruises, when all of the ship’s mission systems undergo rigorous tests to ensure everything is performing properly and that the ship is fully ready for the field season and will collect the highest-quality data possible. The first cruise, from December 1 – 8, 2016, is focused primarily on testing remotely operated vehicle and telepresence systems. The second cruise, running from December 10 – 16, is dedicated to mapping and continued telepresence shakedown.

Where is the Okeanos? online map link

okeanos live map

Okeanos Explorer Shakedown: Camera 1

Okeanos Explorer Shakedown: Camera 2

Okeanos Explorer Shakedown: Camera 3

As part of the attack on Pearl Harbor on December 7, 1941, the Imperial Japanese Navy sent an attack group of submarines to surround Oahu and sink ships attempting to flee. Five of the submarines carried top-secret “mini submarines.” These submarines, each armed with two torpedoes and carrying two crew members, were to penetrate inside the harbor under cover of darkness before the attack began. They were to surface and fire their torpedoes during the aerial attack. Then, they would dive and escape the harbor, and rendezvous with their “mother submarines,” again under cover of darkness the night of December 7.

submarine HA-19
Mounted on the after deck of the “mother” submarine I-24, mini submarine HA-19 is boarded by its crew, Kazuo Sakamaki and Kiyoshi Inagaki, in the pre-dawn hours of December 7, 1941. Painting by Tom W. Freeman, courtesy of Valor in the Pacific National Historical Park

Sakamaki and Inagaki’s HA-19 washed ashore at Bellows Beach, Oahu, on the morning of December 8, 1941. Photo courtesy of Naval History and Heritage Command
The mini submarine discovered in Keʻehi Lagoon in 1960 is lifted to the surface by the U.S. Navy. Photo courtesy of Naval History and Heritage Command

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