Freefall in color by many folks.
Florence: We don't know how sqids respond to radiation, so we're going to keep your exposure as low as practical.
Florence: A sievert is the biological equivalent of one joule of radiation energy per kilogram of matter. We want to keep your exposure less than .05 sieverts total dose for the entire year.
Sam: As low as practical. Not low as possible?
Florence: As low as possible would be not letting you off the planet.
Sam: Ah, yes. Hard to be a daring space captain if you're not allowed in space.