DR, even by your definition, is one component of Piloting. While DR is not
"perfect" (not that anything is) it is still useful. But since you don't know
how DR or any other form of piloting works, you'll never understand.



"JAXAshby" wrote in message
...
Jaxie's simplistic mind can't cope with mixing two concepts. He confuses
"using
DR" with "relying 100% on DR." He never figured out that combining DR with
other info, such as observing lobster pots, depth soundings, and fog signals
is
generally adequate.


jeffies, what you describe above is not DR, but rather pilotage. HUGE
difference in the number or rocks a boat might hit.