CLASSICS 1A03 Lecture 9: Classics Lecture 9
13 May 2016
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Document Summary
As you dive, you breathe in more nitrogen than you do in unpressurized air. This affects the brain and dulls the senses, like alcohol. When a diver rises to the surface too quickly, the bubbles of pressurized air can form in the blood and be fata. Divers must ascend gradually, depending on how long and how deep they were under. Thorough survey and preparation, careful documenting and handling of material found. Use a grid, as in land excavation. Keep track of your materials and where everything is found. Balloon floats (air bag) and cages used to lift artifacts from sea bed. Air lifts, like underwater vacuum cleaners, to pick up material from bottom. Underwater photography essential and effective to document wood. Deposits in water creates different results than on land. Destruction by marine organism wood boring animals. Exposure to sea currents erodes away material.
