Field Trip

Primitive Navigation - Sun Altitude

With the knowledge of the motion of the sun, the ability to find solar declination online, and how time can be used to find longitude from previous lectures in class, students must make a device to measure the altitude of the sun using a straw, protractor, and string weighted down to make horizontal.

In order to take a sighting, they move the protractor, looking at the shadow of the straw taped along the edge of the protractor. When the sun's rays are shining directly through the straw, the size of the shadow of the wall of the straw is...

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