What is XO on submarine?

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Tags

1. #maintenance
2. #destroyer
3. #commanding
4. #tactical
5. #submarine
6. #frigate
7. #managing
8. #shore
9. #logistics
10. #command
11. #squadron
12. #support
13. #aviation
14. #activities
15. #freeing
16. #activity
17. #commander
18. #execution
19. #concentrate
20. #small
21. #planning
22. #typically
23. #officer
24. #responsible