Jud McCranie wrote:
In a Apollo/Saturn V launch, the flight controllers say "mode 1 bravo"
and later "mode 1 charlie". What are these - different abort modes?
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Replace you know what by j to email

Here is a description. There were Modes 1a, 1b, 1c and
2-4.

"http://www.zip.com.au/~psmith/ApolloAbort.html"

- Ed Kyle