The general term is a pirate.
pirates
It attacks ships & whales but i don't think it attacks humans!
Some attacks were mistaken identity. Some attacks were because the ships were sailing in an Allied Convoy. Some attacks were because the ships were armed and Germany considered them as auxiliary warships. Some attacks were because the British were beleived to be flying neutral flags on their ships to trick the U-Boats. Some attacks were because the neutral was in Allied waters and the U-Boat Captain felt the ship was trading with the allies.
they threw you overboard.
Throw ropes with hooks attached to ships or even castles to scale the walls or sides of the ships.
robs phone # is 913.660.6775
A person who robs is called a "Robber".
. . . submarine attacks upon merchant ships .
Robs dad sexually rapes him
U-Boat
A pirate most probably. Or possibly a buccaneer.
attacks on U.S. and British ships
Thomas Jefferson signed the Embargo Acts