Abort mode three

By 6 minutes into the mission, the S-II had worked long enough that, were it to fail, it could be jettisoned and both the S-IVB and the service module's engine would allow the spacecraft to reach orbit. This was essentially abort mode three but the scenario was more often known as contingency orbit insertion (COI). However, had it been invoked, the spacecraft would have had no propulsion remaining that could take it to the Moon. Instead, it would have had to embark on a planned for, but never implemented, Earth orbit mission.

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