[upthesaukee]

Originally Posted by Descant

I recall a sign at one end and red paint on a Birch tree at the north end of the measured mile.
There were similar signs at each end of the Weirs Channel that your transit time should not be less than three (?) minutes from one sign to the next. The northern sign was just before the bridge, so many operated on the assumption that the NWZ started at the bridge, not at the outermost buoy (piling at that time)

The 1951 chart (I use a 1962 version) was published by the Public Utilities Commission a predecessor to Marine Patrol.
For the most part, the rocks haven't changed, so the "old" chart is valid, except where new buoys have been added.
For me, the Bizer chart is cluttered with extra information that makes it difficult to read while underway. Erratic type fonts add to that confusion, so my second choice is the green (Dunphy?) chart. Nevertheless, I carry a Bizer chart on board too. Someday, I'll probably set up a GPS, but not needed yet. The rocks haven't moved since I started navigating as a kid some decades ago.

The Green Chart was made by Duncan. Not sure they are still making the charts. They got extremely cluttered by numbering the spar buoys.

Dave