1,154 were commissioned.
0
Yes
Germany used U boats.
See website: Patrol Torpedo Boats (PT Boats)
Which boats do you mean, there were many but im guessing you was looking for German U-Boats?
To sink ships.
Germans
Germany
Oh god there were about 1500 U boats made during world war 2 and guess what not even 25 remain from the war today,All of them were either,scuttled,sunk,mined,grounded,or captured.
U-boats
German U-boats.
Plywood.