They Don’t Know How to Use Ki

Dr. Gero's laboratory was located on the outskirts of North Capital. He-El took Yamcha and Krillin aboard a fighter jet. They had to pass through East Capital and fly for quite some time before reaching North Capital, a journey that would take about one night. "Get some sleep first. It'll still be a while before we reach North Capital," He-El said as he piloted the fighter jet. "Senior He-El, let's take turns flying the fighter jet.