The twilight warriors crossword puzzle

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Across
  1. 2. A system that uses electromagnetic waves to detect other objects
  2. 4. Someone who either helps control a ship or does maintenance while at sea
  3. 7. When the sun reaches parts of the earth which can't see the sun
  4. 8. A person who flies planes
  5. 13. Where a pilot sits to fly a plane
  6. 14. A smaller piece of land which is completely surrounded by water
  7. 15. When a someone tries encroach on land without the permission of the owner
  8. 16. Means to be invulnerable to something
  9. 17. A type of large plane which was used to drop bombs on targets
  10. 18. A name for a large fleet
  11. 19. The name for the main body of a plane
  12. 20. A large naval ship that has the biggest firepower in a fleet most of the time
Down
  1. 1. Name of the ocean to the west of the Americas
  2. 3. A type of weapon that sends projectiles from large distances
  3. 5. When something is effective both on land and in water
  4. 6. An island country located in the pacific ocean
  5. 9. A Japanese island where the last pacific battle of WWII took place
  6. 10. A pilot who uses their plane to ram the enemy and uses their plane as a projectile
  7. 11. a type of communications device which uses lower frequency waves to send signals from one place to another
  8. 12. someone who is in charge of organizing large groups of soldiers