Mark The Droner
First Officer
Flight distance : 2917 ft
United States
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I'm assuming your assessment of the question is correct and that the "lateral boundaries" are (faded) magenta lines defining the 700 foot floor, as you posted. However, the question says "surface area" so it sounds like it's referring to the dashed magenta lines, not the faded magenta lines. I'm not sure where you got your info that the question refers to the 700 foot floor since the words "surface area of Class E airspace" is within the question. Maybe you didn't post part of the question. Or maybe you may have made a bad assumption. If that's all there is to the question, I agree with you that it's badly worded. It would be so much simpler if they would refer to the area as within a dashed magenta line or a faded magenta line.
I'm not an expert and I don't have and never studied for and I'm not really interested in a 107, but I do like to study and understand the sectional charts. My understanding is, Class E is all over the country from coast to coast but it's over our heads so it usually doesn't affect us. There are at least a couple exceptions. 1) You are within a dashed magenta area. That means Class E drops all the way down to the surface within that dashed magenta area. It's kind of rare but it's because an airport is not big enough to be Class B, C, or D and yet is busy and needs controlled airspace down low for operational safety. 2) You decide you need to fly 400 feet over a tall tower which is within the rules of Part 107 but would potentially take you above 700 feet depending on the tower. In that case, you should check the charts because if you're in a Class E Transitional area as indicated by the faded magenta line surrounding the area, the Class E starts at 700 feet rather than the more common 1200 feet or 14500. So you'd have to stay under 700 feet or get FAA/tower approval.
In this case, you didn't have to look at a sectional because the answer is within the question. But the question by itself seems to be referring to the dashed line, but you've already said it was referring to the (faded) magenta with the 700 foot floor. Maybe there's a part of the question you didn't post? Or maybe you made a bad assumption.
Good luck!
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