How to use a sextant

How does a sextant position longitude and latitude _knowledge _science | Wonderful animals

Lesson & Introduction

Measuring the Latitude and Longitude | Overview & Methods

Ocean_innovator on Instagram: "MARINE SEXTANT AND IT’S BASIC PARTS ✅ A marine sextant is a navigational instrument used to measure the angle between a celestial body (sun, moon, or star) and the horizon. This angle is called the altitude and is used to find a ship’s position at sea. Brief explanation of parts and function: • The telescope is used to view the horizon and the celestial body. • The index mirror and horizon mirror (half-silvered) reflect the image of the sun or star so it appears li

The History of Navigation – Part 2 Astrolabe • Octant • Sextant Long before GPS, sailors crossed oceans using science and the sky. 🔹 Astrolabe Originated around 200 BCE and later adapted for ocean travel in the 1400s–1500s. Sailors used it to measure the height of the sun or stars above the horizon to determine latitude. 🔹 Octant Invented in the 1730s, the octant used mirrors to measure angles, allowing sailors to see the sun and horizon at the same time — far more accurate on a moving ship. �