Across
- 7. that are sent out for months to gather data
- 9. allowed for dives of up to 150 meters
- 10. Portuguese explorer
- 11. First explorer to discover America
- 14. French explorer
- 15. Earliest skilled ocean traders
- 16. explore deep ocean depths that are unsafe for humans
- 17. Italian explorer
- 18. British explorer
- 19. american naval officer
Down
- 1. larger amounts of air in a reserve barrel
- 2. the surface through a tube to supply oxygen
- 3. The first sailing vessels
- 4. First to map the gulf stream
- 5. Extremely successful even during dark ages
- 6. are unmanned and
- 8. Spanish explorer
- 12. English explorer
- 13. A refitted British warship