The Portsmouth Naval Shipyard has built submarines since the early twentieth century, and the most influential of them is on public display just outside the city center. USS Albacore, launched in 1953 and designated AGSS-569, was a research submarine designed to test a new hull form: a smooth, rounded teardrop shape that traded the ship-like lines of earlier submarines for the streamlined profile of a whale. The design proved so stable and fast underwater that it became the basis for nearly every submarine since, and the American Society of Mechanical Engineers recognized the vessel as a historic landmark. After she was retired in 1972, the Albacore was brought to a dry berth at what is now Albacore Park, where she sits on land and can be toured from the inside. A visit lets you climb through the hatches, see the control room, the cramped crew quarters and the unusual features that made her a test platform. The Port of Portsmouth Maritime Museum at the same site adds exhibits on shipbuilding, the Navy yard and the region's maritime story. The park is a modest but rewarding stop, particularly for families, engineers and anyone interested in naval history. Hours and admission are seasonal, so confirm the current schedule before you go.
Inside the boat
The tour is compact, but the space is tight. You climb down a ladder into a hull designed around engines and batteries rather than people, so headroom is low, passageways are narrow, and everything seems to have a function. Visitors see the control area with its gauges and wheels, the bunks stacked in tight tiers, and the engineering spaces that powered an unusually fast vessel for her day.
Placards explain the hydrodynamic experiments conducted on board and the contributions of the many yard workers who built her. It is easy to imagine the crew's daily life, and the exhibit conveys both the ingenuity and the discomfort of Cold War submarine service.
The museum and the park
The Maritime Museum's exhibits cover the shipyard's history, models of vessels, tools and documents, and give context for the Navy's long presence on the river. Outside, the park offers grass, picnic space and a view of the submarine's smooth black hull from every angle. The site is operated by volunteers and a nonprofit, so staffing and opening days may shift, and special events such as veterans' days or open-boat days add variety.
Note that the Naval Shipyard itself is an active military installation and is not open to casual visitors, which makes Albacore Park the main public way to engage with the yard's history.
Visiting notes
The submarine tour involves ladders and tight spaces, so it is not suitable for everyone, particularly visitors with mobility limitations or claustrophobia, and young children should be able to climb and follow safety instructions. The park is a short drive from downtown Portsmouth, with its own parking, making it easy to combine with a visit to the waterfront or Fort Constitution.
Plan for about an hour, longer if you enjoy reading every panel. In summer, go in the morning to avoid heat inside the hull. Check seasonal hours, ticket information and any accessibility updates directly with the museum before your visit.
What to expect
The experience
A self-guided tour through USS Albacore, an experimental teardrop-hull submarine in a dry berth, plus a small maritime museum about the shipyard and the port.
Best time
Seasonal hours; morning in summer is cooler inside the hull.
How long
About an hour to ninety minutes.
Tips
Expect ladders and tight spaces; check seasonal hours and accessibility, and combine with Fort Constitution or the waterfront.
Quick picks
- Best for
- Naval history fans, engineers and families with older children.
- Families
- Kids who enjoy climbing and exploring machinery will love it; the hull has ladders and low headroom.
- Couples
- A different, hands-on stop for a couple that wants something beyond museums.
- Pair with
- Portsmouth Harbor Lighthouse, harbor cruises and the Prescott Park waterfront.
- Time needed
- About an hour and a half.
Good questions
What is special about USS Albacore?+
She was an experimental submarine with a teardrop hull that became the model for modern submarines.
Can I go inside?+
Yes, visitors tour the interior through hatches and ladders, which can be tight.
Can I visit the Naval Shipyard?+
The shipyard is an active military installation and is not open to casual visitors. Albacore Park is the main public site.
Is it open year-round?+
Hours are seasonal, so check the current schedule.
Is it good for young children?+
It suits children who can climb ladders and follow safety rules. Very small children may find it difficult.
