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FINDING YOUR WAY AROUND THE SEA

FINDING YOUR WAY AROUND THE SEA. By: Kirra , Sydney, Elizabeth, Zach, and Miranda. Latitude and Longitude. Used to help locate specific spot on the earths surface. Longitude: vertical Latitude: horizontal

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FINDING YOUR WAY AROUND THE SEA

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  1. FINDING YOUR WAY AROUND THE SEA By: Kirra, Sydney, Elizabeth, Zach, and Miranda.

  2. Latitude and Longitude • Used to help locate specific spot on the earths surface. • Longitude: vertical • Latitude: horizontal • Equator: a line perpendicular to the axis that divides the earth into the northern and southern hemisphere.

  3. Other important parallels • Tropical zone: The area of the earth that lies between the tropic of cancer and the tropic of capricorn. • Meridians: Lines of longitude

  4. Measurements • Nautical mile: unit of distance used in navigation which is equal to one minute of latitude. (1.15 land miles)

  5. Maps and Charts • Maps and charts are 2D representations of the earth’s 3D surface. • Maps usually show land surface • Charts usually show ocean depths

  6. Charts • Bathymetric Charts: shows lines connecting points of similar depth. • Physiographic Charts: uses drawings to show varying depths of the ocean.

  7. Instruments • By utilizing the North Star and an instrument called asextanta seamen can find his location as long as he was in the Northern Hemisphere. • Chronometer: a seagoing clock that could keep accurate time and to determine longitude

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