So I was looking around my home country of South Korea, and stumbled across some air horns on a pole. https://www.google.com/maps/@36.8158233,126.9793456,3a,78.4y,209.17h,120.81t/data=!3m6!1e1!3m4!1s5LtVZntkzmS0kOn1Rd5WtQ!2e0!7i13312!8i6656 Can anyone confirm that this is, indeed part of some warnin...