Churchill AVRE was a Churchill IV armed with a 290 mm Petard spigot mortar. The mount replaced the 6 pounder gun in cast turrets on the Mark IV. The 6 pounder gun mounting was modified, and retained the 6 pounder sights although "flying dustbin" effective range was only around 80 yards. Deep wading gear could be installed for amphibious operations in the form of engine and crew air vents rising higher than the turret roof line- allowing the vehicle to traverse water sources when assailing beaches Designer : M Bergman
