The Sea Wiz is the affectionate nickname given to a 20mm Vulcan Cannon on board the USS George H.W. Bush aircraft carrier. It fires 4,500 rounds a minute, can hit a target five miles away and has ...

The Gatling Gun-style weapon, which is based on the 20mm M61 Vulcan autocannon ... Each barrel could be “capable of firing bullets at a rate of 450,000 rounds per minute.” ...