If IO is on, and you. descend with zero throotle in Gps mode I have heard you. won't cut off the engine. Is this true, I don't want to crash in an emergy descent, rain, birds, etc. I am wary and only descend maybe at 1/3 throttle. Son't know where 10% cutoff is as there is no audible warning, which they ahould have put the option in during manufacture So what is the truth to no. cutoff at zero throttle in ioc mode?