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Latitude and Longitude

22 minutes

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How did early seafarers know where they were, or where they were going? How did they navigate? How do today's airplanes and ships know? What are latitude and longitude? How are they useful? Explains the development and use of latitude, longitude, sextant, chronometer, the Prime Meridian, and other navigational systems from ancient to modern times.

Media Details

Runtime: 22 minutes

US map with image of Native Americans and pilgrims sharing food. New Hampshire, Connecticut, Maryland, and Rhode Island are labeled, and the year 1630 is highlighted. Caption. Maryland was founded in 1632, by Lord Baltimore.
17 minutes 19 seconds
Grade Level: 4 - 7
Topographic map of the hilly terrain of Lookout Mountain Park. Caption. Topographic maps show the elevation of the land.
15 minutes 35 seconds
Grade Level: 3 - 7
Closeup side view of blurry figure with hand to forehead. Caption. Sound of violins playing gloomy tune.
All About Directions
Episode 2
14 minutes 50 seconds
Grade Level: 1 - 5
Man in khaki uniform turns and gestures toward sign hung from tree in a forested area. Title card at bottom reads, "Follow." Caption. Follow the directions.
All About Directions
Episode 4
18 minutes
Grade Level: 1 - 5
Closeup of a person's hand pointing at a spot on a globe in east Russia.
Earth Science
Episode 11
13 minutes 45 seconds
Grade Level: 7 - 12
Digital map of North America with a title overlay that reads, "Weather Map." A red letter L is visible near California, Washington, Mexico, Wyoming, and Mississippi. A blue H is visible near Texas, Missouri, and Tennessee.
Earth Science
Episode 8
11 minutes 21 seconds
Grade Level: 7 - 12
Digital map of Earth with an overlay illustration of a flat sphere shape. Text reads, "Robinson Projection."
Earth Science
Episode 9
6 minutes 26 seconds
Grade Level: 7 - 12
Digital heat map of the United States with title that reads, "Frequency of Damaging Earthquake Shaking Around the United States." The western U, S, is red, orange and yellow. The eastern U, S, is green, blue, and yellow.
Earth Science
Episode 10
5 minutes 15 seconds
Grade Level: 7 - 12
Digital map of earth with longitudinal lines running all the way across. The time on the clock is labeled on bottom and the time differences are labeled on top. The middle section is labeled at 12:00 and 0 time difference.
Earth Science
Episode 12
5 minutes 15 seconds
Grade Level: 7 - 12
Person with a pad of paper and pen kneeling next to a pond with ducks swimming. Closeup of a duck. Caption: with the impacts on the wildlife.
33 minutes 6 seconds
Grade Level: 6 - 9