an airlock
To bad NASAS cancelled.
Title asks allPersonally, i would say that a ship's defenses need to be just as strong as its offenses.I consider the ability to breach a ship's hull with a simple rocket launcher as unnacceptableI also try to make sure that my build is highly detailed and complex, while still having a strong and elegant frame
Radiation shielding or your whole crew will die quickly seeing as the universe is loving bathed in lethal amounts of radiation.