[mad_as_he$$]

Have you ever tried to shoot at a human from a rocking ship or boat?

[dusttoyou]

Have you ever tried to shoot at a human from a rocking ship or boat?

Personally No, but throughout history its a sure thing LOTS of humans have been shot and killed from rocking ships or boats.

If you are more correctly referring to sniping, I have no doubt Navy Seal snipers are more than proficient at this very task.