Haise was a backup lunar module pilot for the Apollo 8 and Apollo 11 missions. He underwent similar training before those launches, even though he didn't participate in the missions. During the training for those missions, crews still occasionally encountered scenarios for which there wasn't a good solution.
In those cases, he said, crews would need to sit down after the simulations and come up with a way to handle the scenarios.
When it came time for the Apollo 13 launch, the crew and Mission Control had been prepared well enough to handle nearly any situation that arose, Haise said.
“You feel reasonably confident in yourself,” he said.
During his speech, Haise marveled at the progress technology has made since the Apollo missions. At the time, Mission Control used a bank of IBM computers that ran on whirring disks of magnetic tape. In the ship's command module and lunar module, the crew used similar equipment, which was some of the most sophisticated technology available at the time.
“We basically went to the moon with that machine that had a total memory of about one-tenth of a megabyte,” he told the crowd. “You've all got more memory on your phones than Mission Control had.”
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We basically went to the moon with that machine that had a total memory of about one-tenth of a megabyte. You've all got more memory on your phones than Mission Control had.”