One of the signs near the Apollo boilerplate. It reads
Apollo Boilerplate Command Module
NASA built several "boilerplate" Apollo command modules for testing and to
train astronauts and other mission crew members. This one is made of aluminum
with a fiberglass outer shell and has an actual command module hatch. It was
used by Apollo astronauts, including the crew of Apollo 11, the first lunar
landing mission, to practice routine and emergency exits. The interior was
later fitted with actual or mockup components to simulate the Apollo-Soyuz
spacecraft and the five-person rescue vehicle for use if an emergency developed
during the Skylab program.
Boilerplate #1102A is displayed here with the flotation collar and bags that
were attached to the Apollo 11 command module Columbia when it
landed in the ocean at the end of its historic mission.