It's not accurate to say that the NASA crew "used" the scientific method in the way we typically think of it during the Apollo 13 mission. The scientific method is a structured process of observation, hypothesis, experimentation, and analysis used to gain knowledge.

However, the Apollo 13 crew demonstrated key aspects of scientific thinking during the crisis:

* Observation: They quickly identified the problem (explosion, oxygen depletion) through monitoring their systems and observing the spacecraft's behavior.

* Problem-solving: The crew and ground control worked together to analyze the situation and brainstorm solutions. They tested different ideas to find the best way to fix the issues.

* Adapting to unexpected situations: The crew and mission control had to adapt their plans constantly as the situation evolved. They used their knowledge and resources creatively to overcome challenges.

The crew and mission control did not have the luxury of conducting formal experiments. Their primary focus was survival and getting the crew home safely. They were forced to rely on their training, ingenuity, and resourcefulness, and the Apollo 13 mission is a testament to the power of human problem-solving in the face of adversity.

It's important to remember that while the crew and mission control didn't follow a textbook scientific method, they employed critical thinking, analysis, and resourcefulness in a way that mirrored the spirit of scientific inquiry. This allowed them to achieve the near-impossible and bring the crew home safely.