Operations and Checkout Building
The five-story structure stands on Merritt Island, Florida, within the Industrial Area of NASA's Kennedy Space Center. Construction finished in 1964 to support spacecraft processing for the Gemini and Apollo eras. The facility features twin-block designs that house crew quarter dormitories for astronauts alongside a large spacecraft workshop. This workshop handled manufacturing and checking activities on all crewed spacecraft during those decades. Officials renamed the completed building the Manned Spacecraft Operations Building shortly after its opening.
A pair of altitude chambers were installed in the High Bay during 1965. Each chamber reached a height of 200 feet with an interior diameter of 80 feet. These human-rated spaces simulated altitudes up to 300,000 feet to test environmental systems. Engineers used them to check life support systems for both the Apollo Command/Service Module and Lunar Module. All crewed missions from Apollo 1 through the Apollo-Soyuz Test Project utilized these specific chambers. Gus Grissom, Ed White, and Roger Chaffee entered their spacecraft for a test inside one of these chambers on the 18th of October 1966.
Facility usage shifted during the 1980s and 1990s to accommodate Spacelab science modules. Workers housed and tested these modules before they flew aboard the Space Shuttle. The building also checked out some International Space Station modules and trusses in the late 1990s and early 2000s. This period marked a transition from lunar exploration hardware to orbital station components. The large workshop space remained essential for assembling complex international equipment.
NASA held a ceremony on the 30th of January 2007, to mark the transition of the high bay for Constellation program use. Florida state funds cleared about 500 tons of steel stands and structures from the facility. Renovations totaling $55 million took place between June 2007 and January 2009. Lockheed Martin became the operator of the facility for Orion production after this work concluded. The Orion spacecraft for Artemis 1 completed its assembly here before moving to another facility on the 16th of January 2021.
The Orion spacecraft for Artemis 2 is under final testing within the building as of July 2024. This ongoing work continues the legacy of processing crewed vehicles inside the historic structure. Officials view the site as the primary location for preparing future deep space missions. The facility remains active while older programs have moved their operations elsewhere. It serves as the final assembly point for the next generation of American astronauts.
On the 21st of January 2000, the building was added to the U.S. National Register of Historic Places. A ceremony held on the 45th anniversary of Apollo 1 renamed it the Neil Armstrong Operations and Checkout Building in 2014. This change honored the first man to walk on the moon. The facility retains its original twin-block design despite decades of modernization. Local listings in Brevard County now include this significant piece of aerospace history.
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Common questions
Where is the Operations and Checkout Building located?
The five-story structure stands on Merritt Island, Florida, within the Industrial Area of NASA's Kennedy Space Center.
When was construction finished for the Operations and Checkout Building?
Construction finished in 1964 to support spacecraft processing for the Gemini and Apollo eras.
What altitude do the altitude chambers inside the Operations and Checkout Building simulate?
These human-rated spaces simulated altitudes up to 300,000 feet to test environmental systems. Engineers used them to check life support systems for both the Apollo Command/Service Module and Lunar Module.
Who entered a spacecraft for a test inside one of these chambers on the 18th of October 1966?
Gus Grissom, Ed White, and Roger Chaffee entered their spacecraft for a test inside one of these chambers on the 18th of October 1966.
How much did renovations cost between June 2007 and January 2009 for the Operations and Checkout Building?
Renovations totaling $55 million took place between June 2007 and January 2009. Lockheed Martin became the operator of the facility for Orion production after this work concluded.
When was the building added to the U.S. National Register of Historic Places?
On the 21st of January 2000, the building was added to the U.S. National Register of Historic Places.