Privateer.
Privateers
Letter of Marque
Privateer
Mainly u-boats, other enemy ships and enemy bombers
Ironclads could destroy wooden enemy ships using either cannon fire or by ramming them.
Other way around: A blockade tries to prevent enemy ships from passing
Yes there were civilian passenger ships that traveled across the Atlantic Ocean during World War 2. Unfortunately during this time there were many civilian passenger ships that never reached their destinations due to disaster striking during their sail.
Such a ship is called a privateer, like a pirate ship except that it holds a license to attack enemy ships.
No
ships were important as if the enemy is by the sea they can attack with the element of surprise.
When the pirates starting attacking ships of the same governments that originally hired them.
SS is short for Steam Ship and used on civilian ships. NS would be Nuclear Ship and there was at least one civilian nuclear powered vessel. US Navy ships carry the prefix of USS for United States Ship. British Navy ships have HMS for Her Majesty's Ship.