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- offensive weapon
- aircraft carriers
-ballast tanks filled with water or air
- hydroplanes - short "wings"
- pressurized tanks
- Built an oared submersible
- air replenishment
- Turtle submarine
- One-man powered
- dive, surface, and be used in combat
- Holland VII
- petroleum engine & electric engine
- Blueprint by world's navies
- diesel engine
- less volatile, better for economy
- submerged for months
- Some submarines - over 100 people
- nuclear-powered
- longer time underneath water
- Diving capacity
- more effective, hold more people
- easier to attack enemies
- underwater cables
- territorial waters - surface
- can travel underwater
- scientific discovery
- investing money
- high-maintenance cost
- holding capacity
- engines for submarines
- created opportunities
This concludes my presentation, any questions?
https://www.explainthatstuff.com/submarines.html
https://navylive.dodlive.mil/2016/04/11/eight-things-to-know-about-u-s-navys-first-submarine/
https://www.thoughtco.com/evolution-of-submarine-design-1992490
https://marinebio.org/creatures/tools/submarines/
https://www.globalfirepower.com/navy-submarines.asp