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.