W0BMU used 600 and 300 meter spark on the barges, it was 1912 or so. I imagine he used BL in Buffalo, if it existed, if it existed and it probably did, American Marconi was running things then having absorbed United Wireless Telegraph Company in 1912 and later USA pushed several corporations to create Radio Corporation of America.

United Wireless Radiotelegraph Station "WA" at Waldorf Astoria, New York City.
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DR

On Fri, May 13, 2022 at 12:41 PM <[email protected]> wrote:
I know David knows the origins of the Lake Erie Swing, but others may not...
The Great Lakes shipping season is summer time.  The 2-3 MHz band was full
of summer
QRN. To help readability the ops used extra long dashes that would be
readable compared to
the short blips of dots that could be lost by a static crash. KB0PB was
fun to copy...
The L E Swing can be very musical.

Perry  w8au