Regarding my challenge: Help me I'm lost in the ocean! I went to read: What details should always be given for a code golf task? and a question raised in my mind. I hope I can ask that here in Meta, if not please let me know and I will delete my question.
My original idea was to produce a challenge that could be easily solved with a basic simple formula, but that maybe it could also seems to be complicated for someone, because I wanted to see how people would intepret it and if someone could produce creative or complex solution to a very simple problem.
To achieve that, I gave all the basic, but complete, minimum information possible that could be needed to solve the problem (which could represent a real life scenario). I didn't add a diagram on purpose, because it would be a visual spoiler of one possibile solution. I didn't say that at this scale the Earth's curve can be fairly approximated to a plane, and other things.
My question was edited and added with many details, diagram and other information that (in my opinion) was implicit in the original simple text.
I have no problem with that and I thank everyone who commented, helped, edited, etc. They did a great job and I appreciated that a lot.
I understand that many questions was asked to me in comments to clarify what I thought to be implicit (and was so) or to be understood with intuition that ultimately the simplification of the problem was to solve a right triangle.
So my question: is mandatory for all the challenges to give complete specifications of the problem, diagrams to every little detail if that means to almost give the way to solve the problem? In other words: Are possible challenges that have some kind of mistery, or implicit information, in them so that people must use intuition and discernment to get the solution in the most efficient way?
Example: I have a problem for which the solution is
2*2=4, I want to represent the problem in a way that is not so intuitive that one have to do just
2*2=4 but there could be many other more complex solutions.
(NOTE: I originally posted the question in the sandbox for more than one day and nothing was commented of what came out later when published on the main site.)