"You're lying," Corriston said. "If you killed me now you'd never get to Mars. You need me and you know it."
"Corriston."
"Yes."
"Don't assume too much. There are practical advantages in keeping you alive but a wrong move on your part could outweigh them. I'd have a fair chance of getting to Mars without your help. I know more than you think about spatial navigation. And the automatic controls are far from unreliable. Without them it would take at least five men to pilot a ship this size to Mars. With their aid a single experienced pilot should be able to accomplish it. I'm pretty sure you've had enough officer training school to qualify as a pilot. A ship's inspection officer has to be able to navigate a ship; I've checked on that. But you're certainly no expert, and if you force my hand I'll take my chance with the auto-controls and my own limited knowledge."
"You'll be taking a chance, all right," Corriston said. "What would you do if the observation glass started showing small pits in the hull from a very large shower of micro-meteorites? Can the auto-controls stop those pits from spreading? I've seen a ship stippled all over in less than ten minutes. The meteor guards won't deflect micro-meteorites, and you've got to alter your velocity and angle of drive and a lot of other things fast. And what happens when your instruments start showing light spectra peculiarities that can't be measured in angstroms? Just a little oddity like that can force you to change your course, but the auto-pilot won't know a thing about it.
"And when you hit the Martian atmosphere and start firing against the direction of motion, how much good do you think limited knowledge will do you? Remember, nearly all of the journey will have been made in free fall, and in free fall the auto-controls are fairly efficient. But the instant you hit the atmosphere the slightest miscalculation in the utilization of your fuel reserves can lead to absolute disaster. I don't know what makes you tick, of course. You may get a distorted kind of pleasure from thinking of yourself as a man marked for death, the same kind of pleasure you get from killing people."
There was silence for a moment. Then Henley drew in his breath sharply and said: "Are you threatening me, Corriston?"
"Just warning you," Corriston said.
"I don't take kindly to warnings, Corriston. If you're not careful I'll put a bullet right through you."
"Do the men who hired you know how you operate, Henley?"