At small unattended airfields, you can sometimes turn on the field lights by transmitting on a particular frequency (as if you were calling the non-existent tow

At small unattended airfields, you can sometimes turn on the field lights by transmitting on a particular frequency (as if you were calling the non-existent tower in quick succession). https://www.aopa.org/news-and-media/all-news/2017/march/flight-training-magazine/how-it-works-lighting https://www.aopa.org/news-and-media/all-news/2017/march/flig... (Of course, in this case it works because the pilot already knows the airfield is there.)