Indicator, Surface Position (SPI), Shuttle, Columbia


Display Status:

This object is on display in the Moving Beyond Earth exhibition at the National Air and Space Museum in Washington, DC.

Collection Item Summary:

This surface position indicator (SPI) instrument was removed from the Space Shuttle Columbia during its upgrade to an electronic "glass cockpit" in 1999-2000. It displays the actual and commanded positions of the elevons, body flap, rudder, aileron and speed brake. The SPI instrument is active during entry and landing and during the entry portion of emergency return-to-launch site phases of flight.

NASA transferred the set of Columbia's old cockpit instruments to the Museum in 2005.

Collection Item Long Description:

Inventory Number


Credit Line

Transferred from NASA Kennedy Space Center and United Space Alliance


Country of Origin

United States of America


Anodized aluminum, cast aluminum, paint, Velcro, plastic, adhesive


3-D: 17.8 x 22.9 x 9.5cm (7 x 9 x 3 3/4 in.)

Data Source

National Air and Space Museum

Restrictions & Rights

Do not reproduce without permission from the Smithsonian Institution, National Air and Space Museum


SPACECRAFT-Manned-Instruments & Payloads