They're looking at it wrong. The signs are operable by the flight crew.
Given:
Aircraft power is on, signs are on.
Aircraft power is off, signs are off.
Aircraft power is operable by the flight crew.
Therefore:
Signs are operable by the flight crew.
In addition to the aircraft main power system(s), there's almost certainly a circuit-breaker that would turn the signs off. It might turn other things off as well, and circuit-breakers are not generally designed to be used regularly as switches, but there's a circuit breaker in reach of the crew that would turn those signs off.
Many years ago, my univerity's choice of calculus book also had the solutions to half the problems (evens or odds, doesn't really matter).
Department policy was also one of "we won't provide you the correct answers" even after an assignment had been turned in because the book was used for multiple years. The publisher had a new edition every year, but the university stuck with the same book because it was used for Calculus I, II, and III, which for most students was 3 or 4 semesters between starting I and finishing III, usually due to a scheduling conflict requiring a semester off between them, or because they had to repeat Calc II since the math department's selection of instructors was particularly bad for that course.
Those same (usually bad) instructors were all too happy to follow the department policy and not provide any feedback other than "correct" or "incorrect".
On the other hand, the university book store carried, and put on the shelf right next to the calculus book, the publisher's "teacher's solution guide", in two very reasonably priced volumes, which had the answers for the other half of the problem sets, as well as the step-by-step process for most of them, which was the valuable part, as you could see where you were erring.
Math department policy was that you weren't allowed to have those, either.
You can guess how well that policy was followed.
Those that put the effort in and learned the material did well. Those that just copied from the solutions book and turned it in did not.
Assuming that they're referring to decimal degree notation, and not Degrees-Minutes-Seconds, and that the location is correct, and ignoring the spheroid vs perfect sphere issues: about 11.1 meters (36.4 ft).
Breaking things with ResEdit was pretty much my jr. high school hobby. It took a bit before I figured out how to restore things when I was done.
Head "tech" guy in the building eventually figured out it was me, showed me a few things and ended up just giving me an un-limited login and a few rules. Also taught me how to intelligently use ResEdit instead of the brute-force method(s) I was used to.
First, I appreciate the answer. I didn't know about the "no large bodies of water" requirement. When then leads me to ask, what's a "large" body of water?
Second, and I'm not trying to be snarky, just trying to understand: What is the limit on size? I understand there's a point where physically building and maintaining it isn't practical, but is still theoretically possible.
As for defeating the point, I'll admit I only somewhat understand that argument.
As far as I understand -- and I'll readily admit I do not have a great understanding -- the whole concept of the eruv is specifically designed to "defeat the point" of another rule (or set of rules).
Why is "defeating the point" considered to be "ok" or not "ok" based on scale?
Likewise, if "defeating the point" is wrong, why is it not always wrong?
Again, my intention is to understand, not to be snarky or otherwise inappropriate about it, and I'll apologize in advance if my questions cross lines I was unaware of.
To which I ask: Why not place a small loop of (wire, cord, thread, whatever qualifies) on the ground in a park somewhere. Then define "outside" and "inside" the other way 'round from "normal", thus making very-nearly the entirety of the earth "inside", and the very small portion "outside".
It seems logical to me, and I've never heard a reason it can't be done other than "that's defeating the point."
Which I admit, it entirely is, but I don't see it as any more "wrong" than encircling entire cities, and it's a whole lot simpler to maintain.
Some states allow "one party consent" to recordings of communications (ie, phone calls). Extending that, as long as Company A is aware of FB's practices, then your wishes are irrelevant as far as the law is concerned.
I have no idea what California's laws are regarding the matter, or the laws governing any of the other participants. I'm just speaking in the general case, that some states allow it, and the argument that could be made.
I had a similar problem, several constraints (dozen or so, iirc), data set of a few thousand items.
I thought about finding an elegant solution, but in the end decided that just doing a (psuedo-)random selection of the remaining set and then running through the resulting ordered list checking each one for all the constraints (ie, random sort). As soon as it failed a hard constraint, or failed > x soft constraints, toss the list and do another random sort.
Ugly, but it worked. Chose this solution because 1) I knew how big the data set would be, and I knew it would not change size enough to matter; 2) The other, very jr developer could understand the method; 3) The constraints, while semi-complex, were simple to check; 4) would be needed once or twice a year, could run completely off-line, and could be started well in advance of when it was needed; 5) and finally computers are fast & cheap, while my time is finite and valuable
As a result, the decision that "brute force" running on any available workstation for a weekend was an acceptable solution. In it's lifetime, I think the longest time it took to find an acceptable solution was a few hundred thousand sorts, finished in a few minutes.
It's now been retired as the program it supported went away.
I wish I'd had the time to explore better, more proper solutions, but at the time, quick and dirty and done was more important.
Regarding other software / platforms, HTTP GET seems easy enough to work with.
My issue with wifi is really just a matter of too-many-networks and interference making it a bad solution for me.
But I understand the appeal of the ESP8266 (and the rest of that family of chips) and don't blame you one bit. IIRC it has a serial port on a couple of pins, so that's another comm option.
In any case, I look forward to seeing your progress. Good luck!
Wish it had more details: Rate(s) of rotation, load capacities -- including windloading, etc.
Also rather wish it didn't rely on wifi/android, but that's mostly because I don't use anything android based, and don't run any wifi on the home network anymore.
All in all though, it's still a pretty nice looking little az-el rotator. With different control software, it might also be a useful little addition to give your static security camera a bit of extra capability without breaking the bank.
They did a lot of the "rails to trails" stuff around here as well, but the underlying deal is that it's all technically land-banked and the railroads can claim it back at basically any time as long as it gets put to active use.
I grew up with the "Save a Connie"[1] plane and organization in my back yard, so to speak -- we lived about 6 miles from the KC downtown airport. I remember dad taking me down to the airport to sit on the river levee and watch the it arrive when they ferried it to KC. After that, I think I attended every public event they hosted between the plane's arrival and the change to the Airline History Museum.
I think I still have a bunch of their airshow flyers and other give-aways squirreled away in the basement somewhere.
Many universities these days have students scattered around the world in various distance education programs, or have students/staff/faculty at various other locations doing research in collaboration with other labs, facilities, etc.
Then there are their research partners, which again may be scattered around the world, etc.
So, no not customers in the traditional sense, but they depend on University services, and many of them are paying for the privilege.
It provides a distraction-free environment for writing.
Save it to a 720kb floppy that my linux box can still read, and move it to a "modern" system for editing and such.