naut, naus, nav

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Across
  1. 1. travel completely around something, especially by ship or plane
  2. 3. an organization of military vessels belonging to a country and available for sea warfare
  3. 5. travel on water propelled by wind or by other means
  4. 7. a Soviet trained to travel in a spacecraft
  5. 8. someone engaged in a dangerous but potentially rewarding adventure
  6. 9. feeling about to vomit
Down
  1. 2. the ship's officer in charge of navigation
  2. 3. able to be sailed on or through safely
  3. 4. relating to or involving ships or shipping or navigation or seamen
  4. 6. a person trained to travel in a spacecraft