Now I've totally confused myself. . .
An all too common result amongst those who slavishly follow that misleading little profile thing without thinking past it, and there are an awful lot of them out there.
As BOAC correctly says the pilot should be keeping a permanent mental plot of where he is in all dimensions. Multiplying by three is hardly a challenge, so why do so few do it?
Still others take great pains to construct a complex imaginary but apparently comforting "circuit" that of course they don't actually fly because radar takes them somewhere else, and still act on the erroneous information the FMC innocently produces!
Whatever happened to airmanship?