What is hardtack and why was it used at sea?

Related questions

1. Where do pirates sleep?
2. Does hardtack taste good?
3. Why do Sand Dollars die?
4. Why do pirates have parrots?
5. What is the difference between pirate and privateer?
6. What are ships biscuits made of?
7. What are pilot biscuits?
8. Was there a pirate code?
9. What is a Seabiscuit shell?
10. What did pirates eat and drink?

Tags

1. #inexpensive
2. #simple
3. #voyages
4. #flour
5. #water
6. #lasting
7. #biscuit
8. #absence
9. #during
10. #campaigns
11. #sometimes
12. #sustenance
13. #commonly
14. #cracker
15. #migrations
16. #hardtack
17. #perishable
18. #foods
19. #military