Air and Sea advancements WW1

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Across
  1. 2. carried planes on the water
  2. 5. boats hidden in plain sight to trick Germans
  3. 7. heavy planes with multiple engines
  4. 10. armoured planes built for repeated attacks
  5. 12. A way to detect new German technological advancements
  6. 13. German invention inflated with hydrogen and used to bomb cities
  7. 14. informed artillery about their accuracy and looked at enemy's back lines
Down
  1. 1. Hidden sea weapons used in blockade
  2. 3. 2 seater plane that looks at enemy back lines
  3. 4. Meant to protect merchant ships travelling through unprotected waters
  4. 6. planes with machine guns mounted on
  5. 8. Advanced British ships and most impactful technological advancement in the navy pre-WW1
  6. 9. stealthy and lethal boats, causing economic reaction from the Entente
  7. 11. A way to protect waterways with a traditional method, with some major weaknesses