About 1,000,000,000 cruise ships but like 1/3 of them are completely unknown and useless.
There are about 80,000 ocean-going ships in the world.
59
4 ships were torpedoed in World War 1.
9,535 ships as of 2010, according to Wikipedia.
103 merchant ships were sunk in world war one
3,000 Allied ships (175 warships; 2,825 merchant ships)
7
1396
About 1,000,000,000 cruise ships but like 1/3 of them are completely unknown and useless.
D: U-Boats sank many ships in the Caribbean during ww
20
65