The useful answer: Short-path propagation follows the shorter great-circle route between two stations and is the default bearing shown by most amateur-radio maps and beam-heading tools.
What changes in real operation
It is only a geometric route; the ionosphere, band, absorption, terrain, and antenna patterns decide whether that route is actually open.
The shortcut that causes trouble
Pointing at the short-path bearing does not prove the received signal arrived there, especially when scatter or long path is active.
Put it into practice
Use the calculated bearing as the starting direction, compare nearby headings and the reciprocal long-path direction, then record what the signal and current propagation actually show.
Practical boundary
Use current equipment instructions, battery and controller limits, measurement references, operating rules, and observed propagation. Planning values and propagation labels are not guarantees.
