What is the 1202 alarm?

The 1202 alarm was an error from the landing computer of the Eagle spacecraft during the first moonlanding by Armstrong and Aldrin, on july 20th, 1969. The error was caused by too much data fed into the computer, because the crew was using 2 radars at the same time. The designers always assumed the crew would use just one radar simultaniously. When you see the long version of the first moonlanding video, you ll hear Neil Armstrong calling the 1202 alarm, and mission control doesnt know what to do with it, until one engineer calls they are GO for landing, and can continue their famous moonlanding.