This evening (greyline), I worked stations on 20 meters long path in Germany, Sweden and Norway whilst parked at the beach (with my car tyres in 6 inches of sea water). Short path provided inferior signal strength to long path (the SM station swung his beam round to test the SP signal strength) - the long path distance is about 20,000 miles.
I think next time I'll attempt to go /MM with my car
LOL! Better make sure you have a hovercraft or James Bonds sub mariner car. LOL!
Never tried driving the mobile that close to the water but you gave me some inspiration. Gonna try that. Hope maybe we get to QSO one day. Even sched various times to make it happen would be cool.