"JAXAshby" wrote in message
...
Thanks for taking your time to share this information. Though I am not a
world sailor, this is quite interesting. I never knew there was a
difference
in terminology regarding dead reckoning.

oh yeah, and there is a HUGE difference in the output between Ded and Dead
Reckoning. those who use ded rec are knowledgeable as to its
uncertainties,
while those who use dead rec are about to now, or will sometime in the
future,
hit the rocks. Assuming they sail at all.

As I said, I am not a world sailor. I rely on GPS and an accurate compass to
take me home. But then again, I am not more than 25 miles or so off shore.
However, I have heard the term used and assumed wrongly that it meant exact
knowledge of position. My hobby happens to be history and the old letters
and books I have read refer to dead reckoning of a position or course. This
thread is quite enlightening giving me a better understanding of the
intended words.

Thanks to all