one dumbass tourist dad i was on the lift with, and this convo took place
Son: Dad, what are those things (they're snowmaking thingies)
Dad: Ummm, son, I, uh think that those must be mortars for dem avalanches
Firtsly, why are you getting seth pistols if you're just skiing park....
Be that as it may, here is the universal chart
http://www.callisto.si.usherb.ca/~lacurve/html_gen/din.html