Despite normal/recurrent training and obvious statements in the AIM and advisory circulars, I've had a lot of pilots recently be very confused on where the line starts. What line? While there are many lines in aviation, the top three I'm concerned about are on the ground at most tower-controlled fields. Time for a refresher.No matter which side of the frequency you're on, early in our training we're exposed to airport markings. We learn where they are, what their significance is, and what our actions must be. Even personnel who work at the airport have to learn these lines. In fact, they're required to learn and pass tests about them.Three of the most important lines on the ground at most tower-controlled fields are the Non-Movement Area Boundary Marking, ILS Hold Position Marking, and Runway Holding Position Marking. Why just towered fields? Markings at non-towered fields exist at towered fields, and towered fields will typically have markings uncommon at non-towered fields. Every line we discuss has meaning and restrictions, which need to be followed. Some lines can be crossed without saying anything to anyone, while others can land you (pun intended) in hot water. Keep in mind, to do an article on all airport markings would be quite long. Advisory Circular 150/5340-1M is the definitive guide. In this article, we'll focus and refresh you on just three of the main markings that you will find at many airports.
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