"Do you ever manage to get anywhere on time?" she teases with a little laugh. If the scientists on his ship are anything like the inventors and tinkerers she knows from home, the likely answer would be 'no.'

Sonar, radar... both concepts she's still struggling to grasp after the thorough and simpler explanation. She doesn't really want to dig out her phone and research what he's talking about, as it's rude to do so when he's doing his best for her now, so she tries rephrasing his example in terms she understands a little better. "So it's like... listening for a sound to come back to you when it bounces off a wall? If something obstructs it, you have an idea of where it is?"