RDF (radio direction finding) ... do you ?
There is a bit of a leap when though if you don't point
out that all those same inaccuracies also apply to the traditionl forms
of navigation.
Indeed they have their problems; what I was trying to point out is they
are direct observations emitted from your boat, not dependent on a
chart (excluding RDF g). Much more like the Mark I eyeball and
earball than GPS is.
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