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        Time and Navigation | STEM in 30

        If you want to know where you are, you need a good clock. For centuries sailors have used clocks to locate where they are out at sea. Today we use synchronized clocks and orbiting satellites for location. In this episode of STEM in 30, we take a look at the challenges of navigating at sea, in the sky, and even in space. Visit the full archived lesson with pictures and audience comments here.

        Originally presented on August 26, 2015 | Explore the Support Materials below for the archived live-stream content with questions, comments, and images shared during the live event.

        Time and Navigation Webcast | STEM in 30

        For centuries sailors have used clocks to locate where they are out at sea. Today we use synchronized clocks and orbiting satellites for location. In this episode of STEM in 30, we take a look at the challenges of navigating at sea, in the sky, and even in space.

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        John Harrison's Seagoing Clocks | STEM in 30

        John Harrison discovered how to build a clock that worked at sea. Witness these magnificant mechanical masterpieces and hear how Harrison invented them.

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        The Longitude Problem | STEM in 30

        Early mariners needed a clock to determine longitude. Discover why time is important to place, especially on the open ocean.

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        The US Naval Observatory Master Clock | STEM in 30

        The United States Naval Observatory Master Clock is the most accurate clock in the world. Discover how these machines measure the oscillation of atoms to determine extremely accurate time.

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