A sextant used in the rescue of Titanic survivors will be sold at auction in the U.K. later this month. The sextant belonged to Sir Arthur Rostron, captain of the rescue ship Carpathia ...

What it's used for: Navigating the high seas after all the other equipment breaks Claiming to have the world's best sextant doesn't sound like much of a boast — it's like bragging about a late ...

Over the course of a decade, the Apollo program (in addition to landing humans on the Moon six times!) produced an incredible array of technical breakthroughs and achievements. But many people do ...

But the instrument being used in the accompanying photograph was a stadimeter, a device used to measure distance, not a sextant. It's not an instrument that gets a lot of press, so it is nice to ...

Recently, the Naval Research Laboratory, working with the Collins Radio Co. of Cedar Rapids, Iowa, revealed some details of a radio sextant that can navigate ships by radio waves from space.