There are many books on the subject, one of them by the same name, goes into great detail about how the Graf Spee was able to detect the British cruisers first due to her very high foretops and the book goes into great lengths about no radar involved. Still, pictures don't lie. I just telling you what I've read.

A good principle to guide me through life: “This is all I have come to expect, standard lackluster performance. Trust nothing, believe no one and realize it will only get worse…”