APOLLO 12 LANDING SITE.
Two charts showing the challenges of making a pin-point landing on the moon, both signed by Alan Bean:
1. "LM Descent Monitoring Chart - (PDI to Landing), Site No. 7," lunar chart, October 8, 1969, 42 by 8 inches. Lunar Module Intrepid's ground track is shown by a white line down the center of the chart, with countdown "minute marks" showing the distance covered prior to PDI (Powered Descent Initiation). Major craters and other lunar features are labeled. Signed by Alan Bean as Apollo 12 LMP.
2. "Apollo 12, Site 7 Hazard Map," lunar chart, 1970, 22 by 17 inches. This map plots every small crater and boulder that could possibility be identified by the highest resolution Lunar Orbiter photography. Inscribed "We made it down safely! Alan Bean, Apollo XII LMP."
After the landing difficulties that had afflicted Neil Armstrong - including almost running out of fuel - NASA made a high-resolution chart for the next lunar landing site.