Scarce and desirable flown double-sided checklist page carried on board Apollo 11, headed "AGS State Vector Update," 5.5 x 8, signed and flight-certified in blue ballpoint, "Carried in Eagle to the Lunar Surface on Apollo XI, Buzz Aldrin." Also signed on the reverse, "Buzz Aldrin." In fine condition. The Abort Guidance System (AGS) was a backup computer in the Lunar Module that could navigate the spacecraft in the event that the primary guidance system failed. Limited in function, the AGS provided an abort capability during descent, ascent, or rendezvous, but could not support guidance for a lunar landing. The AGS was used during Apollo 11 to acquire attitude control after a sequence of rendezvous maneuvers resulted in gimbal lock. An ideal twice-signed piece flown to the moon on man's first lunar landing mission. Accompanied by a full letter of authenticity from Zarelli Space Authentication.
