Neil, I don't know if anybody else will appreciate this video, but I think you'll have fun with it...
i
.
The date at the end says MCMXLIII -- 1943.
.
That's the year they made pennies out of steel (saving copper for the war), but about a dozen copper pennies were struck by mistake.
Today there are only 4-1943 copper pennies known to exist and they're valued at roughly $200,000 each (two hundred thousand dollars).
.
The video shows precise identification of lighthouse beacons based on their flashing timing which is measured by stopwatch.
.
Curiously, such stopwatches were not yet invented during WWI.
.
So as our equipment gets more precise and sophisticated, better observations can be made.
.
This entire video would be nonsense if the earth were "flat" especially for the Cape Charles Light with 740,000 candlepower and 180 ft. in height.
See minute 2. Visibility is given in their tables based on height of the light above sea level, because of earth's curvature.
.
Why is such a powerful light not visible far out at sea? Because of the earth's curvature!