Usage Conditions May Apply Usage Conditions Apply There are restrictions for re-using this media. For more information, visit the Smithsonian's Terms of Use page. IIIF provides researchers rich metadata and image viewing options for comparison of works across cultural heritage collections. More - https://iiif.si.edu View Manifest View in Mirador Viewer Usage Conditions May Apply Usage Conditions Apply There are restrictions for re-using this media. For more information, visit the Smithsonian's Terms of Use page. IIIF provides researchers rich metadata and image viewing options for comparison of works across cultural heritage collections. More - https://iiif.si.edu View Manifest View in Mirador Viewer

This device contains gyroscopes, accelerometers, and other equipment to provide a "stable platform" for the Apollo 15 Command Module. A stable platform is a reference point, from which the astronauts could perform calculations for navigation, guidance, and control from Earth orbit to the Moon and back.

Apollo 15, crewed by astronauts Dave Scott, Al Worden, and James Irwin, was the fourth Apollo mission to the lunar surface, in July, 1971.

Transferred from NASA to the Museum in 1977.

 Display Status

This object is not on display at the National Air and Space Museum. It is either on loan or in storage.
Object Details
Country of Origin United States of America Type INSTRUMENTS-Navigational Manufacturer AC Spark Plug Division, General Motors Corporation
 Dimensions Overall: 13 in. tall x 10 1/2 in. diameter spheroid (33.02 x 26.67cm)
 Materials Case: metal, probably aluminum
Gyroscopes: other metals
 Inventory Number A19770224000 Credit Line Transferred from National Aeronautics and Space Administration Data Source National Air and Space Museum Restrictions & Rights Usage conditions apply
For more information, visit the Smithsonians Terms of Use.