The History of Oceanography

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Across
  1. 4. Nitrogen narcosis ( nitrogen is forced into the blood stream)
  2. 5. (top edge of a boat hull)
  3. 7. (Stationary navigation aids)
  4. 8. (THE ART OF TYING KNOTS)
  5. 10. (A structure build perpendicular to the shore)
  6. 11. ( term used for speed)
  7. 13. Bell (first described in the 4th century by Aristotle)
  8. 14. ( forward part of the ship)
  9. 15. (It is the study of living organisms and their relationship to the chemical, physical and geological nature of the ocean)
  10. 17. (FLOATING NAVIGATIONAL AIDS)
  11. 18. flags used for signaling)
Down
  1. 1. ( where the hull of a ship meets the surface of the water)
  2. 2. sickness (the Bends)
  3. 3. (A structure build parallel to the shore)
  4. 6. Hull (watertight enclosure)
  5. 8. (The vertical section at the rear of the boat)
  6. 9. (area for boats to rest)
  7. 11. Biology(a subset of oceanography)
  8. 12. (an acronym for the Self Contained Underwater Breathing Apparatus invented by Cousteau)
  9. 16. miles (based on the circumference of the Earth)