posted 11-13-2006 01:11 PM
There were several flown astronauts in the program at the time, but the majority of the flown astros were up for commands of their own...or were destined to never fly again. Also, I think very few of the flown astros would have wanted to take the CMP position after Apollo 12, knowing that it would greatly reduce their likelihood of walking on the moon before the program ended.Here's the list of active flown astros that I can think of, as of the end of Apollo 12:
Al Shepard: in line to command Apollo 13/14 with the resolution of his inner ear problems...plus I can't see Al accepting anything other than a command position
Gordo Cooper: already had two commands behind him (if one includes his Mercury flight), was hoping for Apollo 13/14 command before Al was handed the mission
John Young: already had three missions behind him, including one command and one mission as a CMP...plus was in line to command Apollo 16
Jim McDivitt: already had two commands behind him, including an Apollo command...wouldn't have likely considered a CMP role...plus moved into NASA management around this time
Pete Conrad: already commanded Apollo 12 landing, then moved to Skylab in hopes of commanding another spaceflight
Tom Stafford: already had Apollo 10 command duties behind him, not likely interested in a CMP role
Jim Lovell: already in line to command landing mission on Apollo 14/13
Dave Scott: already in line to command Apollo 15, plus already had a CMP mission behind him
Gene Cernan: probably the best candidate of the active flown astros to fly in CMP role, but with the Apollo 10 LMP flight behind him, it seems unlikely he would have accepted anything other than the command on a landing mission. In fact, the story is that he turned down a sure thing as Apollo 16 LMP in order to hold out for command of Apollo 17...a brave move which paid off for him
Dick Gordon: already had the Apollo 12 CMP position, was due to command his own mission (probably Apollo 18)
Walt Cunningham: on the outs with Kraft after Apollo 7, destined to never fly again
Eisele: same as Cunningham, plus already had role of CMP for Apollo 7
Anders: essentially left right after Apollo 8, probably wouldn't have been interested in a CMP role anyway
Schweickart: likelihood of another flight low after Apollo 9, moved to Skylab program
Bean: having walked on the moon for Apollo 12, it's doubtful he would have wanted a CMP position...plus Pete talked him into going to Skylab so he could command his own mission
(Also, it's doubtful that any of the Apollo 11 astros had any desire to fly as CMP following their own mission.)
After looking over the list above, you can see most were either to never fly again or they were due to command their next mission if they were to fly again. So Deke had little option other than to use unflown astronauts in the CMP position. Besides, it wasn't even a hard rule from the start, with Eisele flying his first mission as CMP for Apollo 7...arguably the most critical mission for testing out the command module systems.
[Edited by mjanovec (November 13, 2006).]