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jim hawkins

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Posts posted by jim hawkins

  1. The short version is, the charts were terrible, yet stylish to the extreme!

    True and I've tried putting some sea serpents or 'here be monsters' notes on modern charts but my bosses are never willing to go for it. :(

  2. The short version is, the charts were terrible! They get much better after ~1760s with the invention of shipboard chronometers so that longitude could be determined at sea. Book recomendation:

    Longitude: The True Story of a Lone Genius Who Solved the Greatest Scientific Problem of His Time by Dava Sobel

  3. blackjohn get in on this thread!

    Sounds like Chip logs are period:

    A major advance that made dead-reckoning much more accurate was the invention of the chip log (c.1500-1600). Essentially a crude speedometer, a light line was knotted at regular intervals and weighted to drag in the water. It was tossed overboard over the stern as the pilot counted the knots that were let out during a specific period of time. From this he could determine the speed the vessel was moving. Interestingly, the chip log has long been replaced by equipment that is more advanced but we still refer to miles per hour on the water as knots. Using the sun and the stars, the navigator knew his beginning and ending latitude – now he could determine the distance he had traveled to estimate his east/west position.

  4. Geographic Information Systems (GIS) Coordinator. That's a nice fancy term for using a computer to make maps. So I do some Cartography, some data bashing, some teaching, some web design.

    Hey me too. ESRI software?

  5. Did a week in the southern half of ireland last spring, loved it :ph34r:

    Ring of kerry, blarney castle, galway, dublin, etc. Would love to go back but well its a big planet.

    POTC2

    Im in! Me and ronnie just got 2 of the last 3 tickets.

    (Was going to do the havre de grace event but I got outvoted. ) :ph34r:

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