Re: DR vs EP vs MPP vs Fix vs Running fix
Subject: Re: DR vs EP vs MPP vs Fix vs Running fix
From: Peter Fogg (ffive@XXX.XXX)
Date: Thu Feb 07 2002 - 18:50:49 EST
I agree. Narrow definitions aside, the most useful DR, or EP if you prefer, is the one most likely to be close to the actual position.
Jared Sherman wrote:
> Chuck - and all-
> <"The DR position is only an approximate position because it does not allow
> for the effect of leeway, current, >
> Is there anyone here who would "reckon" their position without attemping to factor in ALL known effects? If one is plotting a DR position while crossing the Gulf Stream, even without knowing the current, is there anyone who would not indicate *some* offset as a best guess of the current, since they approximate current direction and speed are almost certain to exist to some extent?
>
> I ask this as a poll, not as an arguement. My understanding of DR, the good Mr. Bowditch aside, was that a navigator placed EVERYTHING he could into the DR position and that it was supposed to include all "guestimates" of where you actually were, not just ignoring the ones you couldn't specify to five decimal places.
