The above video is of an RC controlled man-o-war from the age of sail firing a broadside. The RC ship is called the HMS Surprise, which is a bit odd since it is flying an American flag. I can only assume the RC crew are a pack of scoundrels flying a false flag for nefarious purposes. Shame on you Jack Tar. Shame, shame, shame!
For comparison, below is a video of the HMS Victory firing a rippling broadside (which is how most broadsides were fired back in the day). Unfortunately they felt they had to create more smoke than the cannons firing put out, which is a shame because it needlessly distracts from what is an impressive display.