 If there was ever an unfortunate event where our firefighters can't escape an oncoming fire then we have a number of protective systems so that the firefighters can take refuge within the vehicle. This water deluge system uses the principle that water has the highest specific heat capacity of any substance. So what that means is water can absorb more heat, more energy than any other substance before it raises its temperature. From our collaboration with CSRO who has identified that the water deluge system has to remain operational for five minutes if the vehicle was ever engulfed in a bird over situation. So the engineering challenge was to ensure that we had enough water for firefighting but enough water and reserve from the vehicle's water tank to feed this water deluge system. Over the years of testing we've had to optimize the flow rate of these nozzles, the angle of these nozzles, the different nozzle types to ensure that we're not wasting any water but we're getting the full five minutes of coverage. Learnings from this has been shared with other agencies throughout Australia and around the world.