am not discounting the claim that red dye was seen at Smith’s Cove and South Shore; due to the speed which the red dye was able to reach both shores,
More on the Red dye test...
Yes, a flooded vertical shaft 465 feet from the shore could potentially have its contents drawn to the shoreline during low tide, depending on the geological connectivity between the shaft and the sea.
In coastal, geological, subterranean shafts are frequently connected to the ocean via underground fissures, porous rock, or abandoned tunnels.
Based on the mechanics of coastal tidal
with these guys it was more like ten to fifteen feet a every twenty four hours,
I think you overlooked the fundamental requirement for digging shafts and tunnels without cribbing and that is it must be done during the dry season. This means the clayish till will be hard, dry and compact. Google AI indicates under these soil conditions, only 1 to 2ft can be dug in a 10 to 12 hour day.
If the party arrives in May, im assuming there would need to be some planning/surveying that must take place before the 4 vertical shafts could be started at south shore but i would expect the horizontal tunnels under the Atlantic could begin in June.
Note: im still assuming the 300 ft tunnels are being dug even though the air bubbles didn't come from these tunnels.
By the end of August, they would have dug about 175 to 200 feet of the four 300ft tunnels through hard compact till.
The next 100 to 125ft would go faster either due to rain or getting near the sea floor making the till softer and easier to dig.
This still means the tunnels would not be completed until October and subject to collapse since that would be in the rainy season.
Conclusion: its not the person who determines the dig rate but the soil/till.
I have heard your counter arguments by increasing work force and working 24hrs which are valid; however. That speculation must also include collapses, equipment failure illnesses, workforce reassignments, unexpected weather,etc. as well. You can't just assume everything will go as planned.
As i have stated before, i do not believe the tunnel system you've developed could hve been dug and sealed in a single dry sean on oak island.