I'm not I understand a 40mm on OPV's. By using an EOIR fire control system you are wasting half of the 40mm capability (that being proper ranking and engagement of air targets). Seems over gunned for a ship that is supposed to intercept illegal migrants, arrest polluters and provide RMP. It's not a bad weapon by far, I quite like it, just in the right circumstances. Perhaps I'm missing something.The Arafura’s will carry the turreted Oto Marlin 40mm Autocannon which is a major improvement over the open Rafael Typhoon 25mm.