An excellent weapon ofr a tanker would be an air booster launched rocket. One thing I don't think alot of the merchant Marines are killers. Myronman, if you are serious about doing this, understand, killing, some it bothers some it don't. When fighting an enemy it is best to consider them as a lesser being. That was all part of the names of our enemies in the past, Japs, Krauts, Gooks, Sand Niggers, ect. ect. I would guess the pirates are like most bullies, bloody thier nose a bit and they will run. Who knows, the Russian arms ship was probably a shipment to them and the Ruskies are just calling it paracy to not let it be known that they are dealing arms.