I toured the only nuclear missile submarine in the US open to the public. Take a look inside.

I toured the only nuclear missile submarine in the US open to the public. Take a look inside.
  • The USS Growler is the only nuclear missile submarine in the US that's open to the public.

  • Commissioned in 1958, the USS Growler patrolled seas off the coast of Russia during the Cold War.

  • The submarine is now an attraction at the Intrepid Museum in New York City.

The USS Growler was once a top-secret US Navy submarine that patrolled the ocean's depths during the Cold War. Armed with nuclear missiles and operated by a crew of 90 men, Growler's firepower acted as a deterrent to keep other nations from using their nuclear weapons in a strategy known as mutually assured destruction.

Today, the USS Growler is on display at the Intrepid Museum in New York City housed on the USS Intrepid, a 900-foot-long World War II-era aircraft carrier. The USS Growler floats alongside it in the Hudson River.

Visitors don't just get to look at the USS Growler; they can actually climb inside and walk through its narrow confines on a self-guided tour.

Submarines remain a crucial component of the US Navy's deterrent strategy. In September, the USS Georgia, a guided-missile submarine, was sent to the Middle East in a show of support for Israel and a show of force to Iran.

It's a costly endeavor. The US Navy's Virginia-class submarine program is projected to run $17 billion over budget through 2030 amid delays, House Rep. Ken Calvert, chairman of the House defense appropriations subcommittee, said last month. The Navy has said delays are due to supply-chain issues and "lingering COVID-19 impacts."

I visited the Intrepid Museum in May to tour the only nuclear missile submarine in the US open to the public. Take a look inside.

The Intrepid Museum in New York City displays historic vessels used in sea, air, and space exploration as well as military operations.

The entrance to the Intrepid Museum in New York.
The Intrepid Museum.Deb Cohn-Orbach/UCG/Universal Images Group via Getty Images

Tickets cost $36 per adult and $26 per child over 4 years old and can be purchased on the Intrepid Museum's website. Veterans and military service members receive free admission.

One of the museum's top attractions is a self-guided tour of the USS Growler submarine.

The line to enter the USS Growler.
The line to enter the USS Growler.Talia Lakritz/Business Insider

Every time I've visited the Intrepid Museum, there has been a line to enter the submarine due to the attraction's popularity and small, enclosed spaces.

The line moved quickly when I visited in May — I only waited for about 15 minutes.

The USS Growler patrolled the seas on top-secret missions off the coast of Russia during the Cold War.

The USS Growler.
The USS Growler on its launch day.Naval History and Heritage Command

Commissioned in 1958, the USS Growler carried Regulus II sea-to-surface missiles armed with nuclear warheads. The looming threat of the submarine's firepower acted as a deterrent to prevent other countries from using their nuclear arsenals.

The submarine now floats in the Hudson River with its top deck visible from the dock of the museum.

The Growler submarine at the Intrepid Museum.
The USS Growler submarine at the Intrepid Museum.John Arehart/Shutterstock

Growler was decommissioned in 1964 and awarded to the Intrepid Museum in 1988. The Intrepid Museum spent over $1 million repairing the submarine in 2008 when holes were discovered in its hull during a museum-wide renovation, The New York Times reported.

Exhibits provided a brief history of the USS Growler and the nuclear missiles it carried before entering the submarine.

An exhibit about the USS Growler.
An exhibit about the USS Growler.Talia Lakritz/Business Insider

The first Regulus missiles had a range of 500 miles. Regulus II missiles could travel twice that distance.

There was also a sample doorway to make sure guests could walk through the submarine.

A sample doorway size before entering the USS Growler.
A sample doorway size before entering the USS Growler.Talia Lakritz/Business Insider

To visit the USS Growler, guests had to be at least 40 inches tall and had to be able to pass through this doorway without assistance.

The first stop inside the submarine was one of the USS Growler's two missile hangars.

The missile hangar in the USS Growler.
The missile hangar.Talia Lakritz/Business Insider

Each hangar could hold two Regulus I missiles, which each measured 33 feet long, according to the National Air and Space Museum.

In the navigation compartment, crew members plotted courses and tracked Growler's position.

The navigation compartment on the USS Growler.
The navigation compartment.Talia Lakritz/Business Insider

Growler used a binnacle — a stand that holds a ship's compass — and SINS — the Ship's Inertial Navigation System — to navigate through the seas.

The missile checkout and guidance center was once a top-secret area.

The missile checkout and guidance center on the USS Growler.
The missile checkout and guidance center.Talia Lakritz/Business Insider

Crew members assigned to the missile checkout and guidance center were in charge of maintaining, firing, and guiding the trajectory of the Regulus missiles. Launching a Regulus missile took about 15 minutes.

Officers on the USS Growler lived in staterooms that held two to three people.

The officers' stateroom on the USS Growler.
The officers' stateroom.Talia Lakritz/Business Insider

Officers acted as leaders and commanders of the crew, overseeing the day-to-day operations of the submarine.

Their staterooms featured folding sinks and desks with chairs that included storage drawers to maximize the tight quarters.

Officers had access to their own shower.

The officers' shower on the USS Growler.
A shower.Talia Lakritz/Business Insider

Crew members shared a separate washroom.

Officers used the wardroom to eat, socialize, and hold meetings.

The wardroom aboard the USS Growler.
The wardroom.Talia Lakritz/Business Insider

The wardroom was furnished with laminate walls and vinyl seating booths, popular interior design trends post-World War II.

Officers' meals were cooked in the galley and served from the wardroom pantry.

The pantry on the USS Growler.
The wardroom pantry.Talia Lakritz/Business Insider

The USS Growler carried all of the food and supplies it would need to sustain itself during patrols that lasted over two months.

A storekeeper kept track of non-food supplies such as light bulbs, pens, and toilet paper.

The USS Growler's commanding officer enjoyed the only private room on the entire submarine as its highest-ranked leader.

The commanding officer's stateroom on the USS Growler.
The commanding officer's stateroom.Talia Lakritz/Business Insider

The room featured a telephone and a bed that folded up into seating.

The chief petty officers' quarters were nicknamed the "goat locker."

The chief petty officer quarters aboard the USS Growler.
The chief petty officers' quarters.Talia Lakritz/Business Insider

Chief petty officers helped train new submariners and acted as leaders and liaisons between officers and crew members.

The nickname "goat locker" dates back to 1893, when the rank of chief petty officer was established. Chief petty officers were put in charge of the goats that were kept on ships to produce milk, and the animals' pens were located in their quarters, according to the Naval History and Heritage Command.

Yeomen handled clerical and administrative work aboard the USS Growler's tiny office.

An office on the USS Growler.
An office.Talia Lakritz/Business Insider

Yeomen wrote reports, sorted files, and maintained crew members' service records.

A ladder in the bridge trunk led to the bridge of the submarine.

The bridge trunk on the USS Growler submarine.
The bridge trunk.Talia Lakritz/Business Insider

When the USS Growler traveled on the surface of the water, the bridge provided a vantage point for crew members to surveil the surrounding ocean.

Seeing how far down I was in the submarine was striking. I couldn't imagine what it must have been like to serve on a two-month-long patrol with no fresh air or sunlight.

The control room and attack center contained a dizzying amount of buttons, dials, and other instruments.

The control room and attack center on the USS Growler.
The control room and attack center.Talia Lakritz/Business Insider

Crew members monitored the USS Growler's function with data gathered in the control room and attack center.

Here, the commanding officer would give orders to the crew.

The control and attack center on the USS Growler.
The control and attack center.Talia Lakritz/Business Insider

The crew members who sat in the chairs directed the USS Growler's movements with three steering wheels that controlled different angles and movements.

The room also featured two periscopes: one for observation and one for attacks.

A periscope on the USS Growler submarine.
A periscope.pio3/Shutterstock

The periscope used for observation featured a wider view, while the attack periscope had higher magnification capabilities.

A call signal station could signal different areas of the submarine such as the ward room, the office, and the control room.

A call box on the USS Growler submarine.
A call signal station.Talia Lakritz/Business Insider

Each room had a corresponding number that crew members could dial.

The sonar room also aided Growler's navigation.

The sonar room on the USS Growler submarine.
The sonar room.Talia Lakritz/Business Insider

Sonar stands for sound navigation and ranging. The USS Growler used passive sonar, a system of underwater microphones that listen to the ocean and detect sound waves, to track other vessels and navigate its own positions.

Passive sonar is a more discreet alternative to active sonar, which sends a pulse of energy through the water to detect objects.

Crew members communicated with other ships in the radio room.

The radio room on the USS Growler.
The radio room.Talia Lakritz/Business Insider

The USS Growler could only send messages at periscope depth. Lower down in the ocean, it could receive low-frequency signals, but couldn't send any outgoing messages.

Meals were prepared in the galley.

The kitchen on the USS Growler submarine.
The galley.Talia Lakritz/Business Insider

A meal schedule from 1962 listed dishes such as fried chicken, clam chowder, hamburgers, and meatloaf with gravy.

In the scullery, Growler crew members washed dishes and compacted trash.

The scullery aboard the USS Growler submarine.
The scullery.Talia Lakritz/Business Insider

Trash was disposed of in weighted tubes that wouldn't float to the surface and give away the submarine's location.

The crew's mess was the only common space on the USS Growler.

The crew's mess on the USS Growler submarine.
The crew's mess.Talia Lakritz/Business Insider

It functioned as the dining room as well as a place for crew members to play games and watch movies.

Growler's largest sleeping area contained 46 bunks.

The crew's quarters on the USS Growler.
The crew's quarters.Talia Lakritz/Business Insider

The green straps on the beds kept crew members from rolling out of the bunks during rough seas.

The crew's washroom featured two showers.

The crew's washroom on the USS Growler.
The crew's washroom.Talia Lakritz/Business Insider

Showers were a rare luxury for crew members on the USS Growler. A plaque displayed in the room read that some sailors said they never showered once during their two-month patrols.

A distillation system boiled seawater, filtering out the salt to supply fresh water.

Distillers on the USS Growler.
Distillers.Talia Lakritz/Business Insider

The distilled water was used for cooling the submarine's diesel engines, cooking food, washing dishes, and bathing.

Growler's three diesel engines were located in the engine room.

The engine room on the USS Growler.
The engine room.Talia Lakritz/Business Insider

The engines were soundproofed.

Sailors controlled Growler's speed in the maneuvering room, with officers communicating orders from the control room.

The maneuvering room.
The maneuvering room.Talia Lakritz/Business Insider

The USS Growler's maximum speed was 12 knots, or 14 mph, while submerged and 14 knots, or 16 mph, while surfaced.

In addition to carrying nuclear missiles, the USS Growler was also armed with torpedoes.

The aft torpedo room on the USS Growler.
The aft torpedo room.Talia Lakritz/Business Insider

Nine crew members slept in the aft torpedo room, where weapons like the Mark 37 torpedo were kept.

I was relieved to see the sky again as I exited the USS Growler, and in awe of service members who spent months at a time on the vessel.

A staircase leading out of the USS Growler.
Leaving the USS Growler.Talia Lakritz/Business Insider

As the only nuclear missile submarine in the US that's open to the public, visiting the USS Growler is absolutely worth a trip to the Intrepid Museum.

I was fascinated by how self-sufficient the submarine was as it carried out top-secret patrols. It was hard to believe that 90 crew members operated in such small spaces for extended periods of time.

With its supply of nuclear missiles kept at the ready during the Cold War, the stakes couldn't have been higher to keep the USS Growler running smoothly and efficiently. The stakes remain high today as US Navy submarines continue to patrol waters connected to regional conflicts.

Read the original article on Business Insider