NOAA Nautical Chart: Tampa Bay, Florida
NOAA nautical charts, such as this chart of Tampa Bay, Florida, are important tools to help mariners navigate safely at sea. A nautical chart is a graphical portrayal of the marine environment, showing the nature and form of the coast, the depths of the water, character and configuration of the sea bottom, locations of hazards and dangers, the rise and fall of the tides, ocean currents, magnetic variation, regulatory boundaries, and the locations of aids to navigation (e.g., lights, buoys, beacons and other important landmarks).
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(Original source: National Ocean Service Image Gallery)