We were in the practice area south of the airport with the radio tuned to Seattle Approach.
Although we were not getting flight following—the request was denied because ATC was too busy—I insisted on monitoring the frequency. I was about to explain why to the learner when another pilot requested the RNAV 35 approach to the airport starting at ARWEL, an IFR fix a few miles to the east of us and about 1,000 feet above us as published.
