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Ancient Egypt

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1400 and 1500 BC

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Was there a problem with it for the sailors?

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Was there a problem with it for the sailors?

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Yes, there was because the lead that the sailors put at the bottom of the rope was poisonous. Another problem with the lead line was that it was inconvenient to run aground.

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Angelina Zheng, Peyton Sturma, Landon Fitzgerald, Amanda Pankiewicz , Laylen Deering, Clayton Schaal

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The Lead Line was an important technology during the AGE of EXPLORATION because 

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The Lead Line was an important technology during the AGE of EXPLORATION because 

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then the sailors know if they would scrape the bottom of the boat on the ocean floor.

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1. A person who uses a lead line is called a leadman.
2. The lead line is marked at specific intervals: 2, 3, 5, 7, 10, 13, 15 and 20 fathoms. Different kinds of marks are used so the leadman can tell the depth even in the dark!
3. The lead line replaced a measuring stick that was used before the lead line was invented.  The stick couldn’t reach that far down into the water but the lead line can reach a lot further than the stick.

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How was it useful and important to the explorers during the 1400 and 1500s?

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How was it useful and important to the explorers during the 1400 and 1500s?

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The lead line was important because it helped the sailors know if their boat would crash against the ocean floor.

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The lead line has to be improved because the lead part was really poisonous to the sailors.   

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The lead line has to be improved because the lead part was really poisonous to the sailors.   

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A lead line is used by slowly dropping it into the water and when it touches the ocean floor, you stop dropping it. Once the lead part is touching the bottom you look at the lines on the rope (fathoms). Once you count the fathoms, you know how close you are to the ocean floor.