Terminator (sunrise/sunset line)Subsolar point (sun overhead)Your locationDX Compass ring (heading alignment)Top favorable heading(s)
Coastlines (Natural Earth, public domain) with a light lat/lon reference grid on top. Shading is a continuous day→twilight→night gradient based on computed solar elevation, not a flat on/off split.
Grayline DX Compass — Favorable Headings Right Now
From your location, these are the compass directions whose great-circle path currently rides closest to the terminator over the next ~8,000 km — the geometric condition behind classic grayline DX.