Varies country to country but generally speaking having firearms for protection on civilan ships is not illegal under any international law. Now there is most likely a limit on number and size of the said firearms but that's another story...
Civilian Complaint Review Board was created in 1993.
Privateers
Firearms are forbidden on board.
No, they do not use firearms. They are civilian organisation, and are not authorised to carry firearms. If firearms are ever required in an operation, the local police's armed response unit is contacted.
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.
Privateer.
No. Firearms International Corp was primarily an importer of European made civilian hunting arms.
Yes. There are an estimated 520,000 legally owned firearms in civilian possession in Qatar.
Depends on the laws of where you are- In most of the US, a civilian may legally carry the same firearms that are carried by the military. In other countries, there are limits on what guns may be owned by a civilian. So...... since you did not say where you are from, we can't help answer your question. Sorry-
You don't specify if you mean long guns or hand guns, civilian or military.
That depends on the gun laws in your locale. Some countries prohibit civilian ownership of firearms chambered for military cartridges, and some prohibit civilian ownership of firearms, period. However, in the US, the WWII rifles have been by the government into the civil market, or else have been released through the Civilian Marksmanship Programme.
At sea, but not in port.