"Astrophysics."
"That might explain it. Second specialty?"
"Astrogation." He couldn't resist adding, "That's more advanced than the
simple space navigation you use, Commander."
O'Brine started to retort, then apparently thought better of it. "I hope
you'll be able to carry out your orders, Lieutenant," he said stiffly.
"I hope, but not much. I don't think you can."