Submarines would need thick, strong walls because They would have to withstand the pressure of the water that would increase the deeper they go, to do this they would need stronger and thicker materials to cope with the force (This would help keep the people safe).
because they have to withstand the pressure of the water when they go down under water. and to keep the people safe :)
1. Ballistic submarines 2. Attack submarines
Submarines - poem - was created in 1917.
One of our Submarines was created in 1982.
Dallas Submarines was created in 1920.
Boats, Subs, Submarines, Home.
Yes, North Korea has submarines
Argentina had diesel-electric submarines while the British had nuclear-powered submarines.
All submarines can sink. Some can return to the surface.
submarines dont sail idiot
USA has the most nuclear submarines
Submarines and Aircraft Carriers