A lot of spaceflight training is about building confidence before the real work begins. NBL training brings classroom instruction and pool runs together so crews can learn the procedures, practice them carefully, and build familiarity over time. That preparation is what makes execution possible.
This was my first time working on the Alpha Magnetic Spectrometer (AMS) in the pool — one of the tasks we may need to perform during an EVA on our upcoming mission. There's something grounding about getting your hands on hardware for the first time and starting to connect what you've studied with what you'll actually do. A long way to go, but that's what the training is for.