Naut, naus, nav = sea, ship, travelers

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Across
  1. 1. a person who is trained to plan the course of and drive a ship
  2. 7. a Russian who is trained to travel into outer space
  3. 8. to steer or direct a ship or airplane
  4. 9. to Travel around the earth on water or in the air
Down
  1. 2. person who traveled west to take part in California Gold Rush
  2. 3. affected with a feeling of sickness in the stomach: sea sickness
  3. 4. related to sailing, sailors, ships
  4. 5. wide or deep enough for ships to be able to pass
  5. 6. a person who is trained to travel into outer space
  6. 8. a fleet of ships; all the warships of a nation