These are the only two navigational systems with global coverage.

Its systems would often break down, especially the navigational systems.

Electronic navigational systems have made even this simple measure unnecessary.

"There must be a way we can overcome whatever lockout he's done on the navigational system."

They went out before the modern ships-back when we hardly had navigational systems at all.

Standing next to Dax, he entered something into the navigational system.

I thought my problems were solved recently, when we bought a new car with a navigational system.

"Have you checked the navigational systems and the console connections?"

These points make up the navigational system used inside Rama.

But the pilot complained of problems with the airplane's navigational system.