Puleeeeeze!
That kind of stuff is what I do every day for a living.
For fun, I like the kind of navigation where a minute of arc error (1 nautical mile) is considered excellent. You can see that far.
A really good operator with a sextant, under ideal conditions, can place you within a thousand yards of your position. The best I've ever done is about a mile and a half. That's about average for a professional on a big, stable vessel. On a sailboat, anywhere within five miles is good enough. You can find Hawaii that way.