What is a Sextant? The Basics of a Navigational Instrument for Measuring Celestial Altitude

When studying navigational instruments, the sextant appears quite early on.Unlike electronic devices such as radar, GPS, or ECDIS, it has the appearance of a truly "old-fashioned navigational ...

Why can a sextant measure angles? The mechanism of measuring angles with two mirrors

Last time, I talked about how a sextant is a nautical instrument that measures the angle between two directions, such as a celestial body and the horizon.So, why exactly can a sextant measure angles ...
theepochtimes

Naval Academy Reinstates Celestial Navigation

ANNAPOLIS, Md.—The same techniques guided ancient Polynesians in the open Pacific and led Sir Ernest Shackleton to remote Antarctica, then oriented astronauts when the Apollo 12 was disabled by ...

In 2015, the US Naval Academy put celestial navigation back in the syllabus after dropping it in 1998; officers learn the sextant in case GPS is jammed or spoofed

In the wake of GPS vulnerabilities, the US Naval Academy has taken a significant step by reinstating celestial navigation ...
KQED

Celestial Navigation: Finding Your Way in the Dark

Earth's coordinates and the Celestial SphereI’m dusting off the plastic tub where I keep all the materials for my Celestial Navigation class, in preparation for teaching it again, starting March 4. It ...