JAXAshby wrote:
over the knee, if you expand the definition to include gps charterplotters,
anything is possible.

If I use a gps chart plotter (assuming gps working and connected) then I
have a fix not a "DR" position

same same if you expand the definition of breakfast eggs to include three
bricks of 24-k gold, you would be rich.

DR is speed vs time vs direction pointed, and your best guess as to where that
puts you. that's it, nothing more.

As stated before, you know "A" definition of DR, nothing more.
All this and your last post tell me is that you have extremely limited
experience and knowledge of the subject.

Some people believe that guessing as to current direction and strength and
guessing as to boat drift due to wind speed and direction improves their best
guess as to where they are, but it doesn't.

Statement shows limited experience.

DR has been used for centuries and is still used today. As such, it's
used to travel new routes as well as those that have been frequently
done in the past.
For this reason, many sailors have expanded on the term "DR" to include
past experience; their knowledge of how their vessel reacts to winds,
known currents; soundings, etc. .... i.e. they use these factors to
improve/fine tune their "DR" plots.
As Bowditch states, your definition is correct, but it's not universal.
For you, "DR" is speed/time/direction and that's OK since it's probably
all your experience can handle, but for many others, it includes a
number of other factors beyond your capabilities which don't give a
position and can be in error, but from experience, helps improve what
*THEY* call "DR".

otn



joe, you don't understand the definition of the term "DR".

jax, you don't know the definition of "DR", you only know A definition
of "DR", and the fact that *you* don't understand this is not surprising.

otn