U.S. Naval Undersea Museum

U.S. Naval Undersea Museum The OFFICIAL Page of the U.S. Naval Undersea Museum,
Dept. of The Navy - www.history.navy.mil/num Open Wednesday-Monday 10:00 AM – 4:00 PM. Closed Tuesdays. Navy.

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We are forever indebted to those who have paid the ultimate sacrifice in service to our Nation. We honor them today and ...
05/25/2026

We are forever indebted to those who have paid the ultimate sacrifice in service to our Nation. We honor them today and always.

in 1939, submarine USS Squalus (SS 192) sank off Portsmouth, New Hampshire, during a test dive. Uncontrolled flooding ...
05/23/2026

in 1939, submarine USS Squalus (SS 192) sank off Portsmouth, New Hampshire, during a test dive. Uncontrolled flooding in the aft compartments drowned 26 crew members immediately; 33 men survived inside the bottomed sub.

U.S. Navy divers rescued all 33 survivors using the newly-developed McCann submarine rescue chamber. Over the next four months, the wreckage of Squalus was painstakingly salvaged to recover the bodies and determine the accident's cause — the failure of the main induction valve.

Squalus was retrofitted and returned to service as USS Sailfish in May 1940. Sailfish made 12 war patrols during World War II, earning nine battle stars and a Presidential Unit Citation.

Today marks 58 years since fast attack submarine USS Scorpion (SSN 589) was lost with the death of all 99 aboard. Scorpi...
05/22/2026

Today marks 58 years since fast attack submarine USS Scorpion (SSN 589) was lost with the death of all 99 aboard. Scorpion was operating near the Azores on her way home to Norfolk, Virginia. Her loss — one of the U.S. Navy’s greatest non-wartime tragedies — was deeply felt in the submarine community and throughout the Navy.

These are a few of the 12 officers and 87 crew lost that day. Click their photos to learn more.

Help remember Scorpion and her crew by sharing your connections, stories, or memories.

As we prepare to honor the fallen on Memorial Day next Monday, our exhibit Faces of the Deep will remember undersea Sail...
05/19/2026

As we prepare to honor the fallen on Memorial Day next Monday, our exhibit Faces of the Deep will remember undersea Sailors killed in action.

Chief Rosoe Pennington, a nuclear-trained electrician's mate, died in the sinking of USS Thresher (SSN 593) in April 1963.

Navy diver Owen Hammerberg died rescuing two fellow divers in 1945, saving both their lives as he sacrificed his own.

Captain John Cromwell chose to ride his sinking submarine to his death in 1943, knowing his couldn't risk capture due to his advanced knowledge of impending secret war operations.

Their stories, and those of other Sailors who died in service to the country, will be on display through the end of the month.

On Armed Forces Day, we share our unending appreciation for the proud patriots who answered the call to serve, taking th...
05/16/2026

On Armed Forces Day, we share our unending appreciation for the proud patriots who answered the call to serve, taking the sacred oath to defend our Constitution. We salute our Sailors, past and present, and their shipmates across the DOD.

We are excited to host the final Navy Band Northwest concert of the season this Sunday, May 17, at 2:00pm! The Protocol ...
05/14/2026

We are excited to host the final Navy Band Northwest concert of the season this Sunday, May 17, at 2:00pm!

The Protocol Combo is taking the stage to bring a vibrant selection of current hits and contemporary favorites. Whether you’re a fan of today’s top charts or just looking for a lively atmosphere, this group is designed to get you on your feet!

Developed in secrecy during the early years of World War II, the "Mine" MK 24 was the U.S. Navy's first passive homing t...
05/14/2026

Developed in secrecy during the early years of World War II, the "Mine" MK 24 was the U.S. Navy's first passive homing torpedo. Calling it a mine was a strategic maneuver to deceive the enemy.

As a homing torpedo, the MK 24 was the opposite of a stationary mine. Hydrophone elements in its nose received sound signals created by enemy submarines, allowing the torpedo's receiver to compute the direction of the sound. The guidance section used this information to generate steering commands that pointed the torpedo directly toward the sound source — the target.

The MK 24 entered service in spring 1943. Its first successful use by the U.S. Navy is believed to be the sinking of German U-boat U-640 in 1943.

In 142 attacks made by U.S. ships during World War II, the MK 24 sank or damaged 32 percent of German U-boats targeted, a very high success rate for an anti-submarine weapon at the time. The MK 24 earned the nickname "Fido" — "faithful" — for its reliability.

USS Triton (SSRN 586) arrived home to Groton in 1960 after completing the first submerged voyage around the world! 🌎Th...
05/10/2026

USS Triton (SSRN 586) arrived home to Groton in 1960 after completing the first submerged voyage around the world! 🌎

The radar picket submarine traveled underwater for more than 36,000 nautical miles to complete the historic circumnavigation, surfacing only once to transfer an ill crew member off the sub.

Triton was a unique ship: the largest sub ever then built, the only ship in her class, and the only American submarine to have two nuclear reactors.

Her submerged trip around the earth demonstrated the endurance and speed capabilities of nuclear submarines less than six years after the introduction of nuclear propulsion. The impressive feat earned Triton a Presidential Unit Citation and her commanding officer, Captain Edward "Ned" Beach, a Legion of Merit.

Moms are the anchor of the . ⚓ In the fleet and at home, today we recognize all you do, inspiring us with your dedicati...
05/10/2026

Moms are the anchor of the . ⚓

In the fleet and at home, today we recognize all you do, inspiring us with your dedication, strength, and love.

One of our most significant artifacts, NR-1's control room equipment, joined our artifact collection in 2018!NR-1 was ...
05/08/2026

One of our most significant artifacts, NR-1's control room equipment, joined our artifact collection in 2018!

NR-1 was the definition of unique — the 146-foot vessel was the U.S. Navy's only nuclear-powered research submersible. Her nuclear reactor allowed her 11-person crew remain submerged for up to 30 days at time. NR-1 and her elite crews carried out classified and unclassified missions for almost 40 years before the submersible's inactivation in 2008.

Our acquisition of NR-1's control room equipment was made possible by PSNS & IMF on the Waterfront, who painstakingly saved and reassembled the equipment for us during NR-1's recycling process.

In 2021, we turned the equipment into an amazingly detailed digital model through a collaboration with The Arc/k Project — explore the model here: https://bit.ly/3HJYGND!

May is the Month of the Military Diver! We celebrate Navy Divers, EOD technicians, Navy SEALs, Seabee divers, and all mi...
05/07/2026

May is the Month of the Military Diver! We celebrate Navy Divers, EOD technicians, Navy SEALs, Seabee divers, and all military service members who earn diving qualifications.

Divers in the U.S. Navy possess exceptional diving expertise and abilities — excellence necessary to safely handle the dangerous, challenging nature of military diving.

The Navy has relied on military divers since 1882, when the first Navy diving school was established. Today, despite the advent of undersea technology like UUVs, the ingenuity of human divers remains essential to many Navy operations.

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1 Garnett Way
Keyport, WA
98345

Opening Hours

Monday 10am - 4pm
Wednesday 10am - 4pm
Thursday 10am - 4pm
Friday 10am - 4pm
Saturday 10am - 4pm
Sunday 10am - 4pm

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(360)3964148

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