Drag to pan. Scroll to zoom. Use + − controls (bottom-right). Select a Region in the menu to jump to a continent.
Night shading — shows the day/night terminator across the globe. Satellite tracks — 80-point ground trails for each tracked satellite. Sun & Moon — markers at the subsolar and sublunar points with moon phase in the status bar (off by default).
Satellite list — real-time name, altitude, and lat/lon. FT8 Spots — last 10 FT8 DX spots from the cluster. APRS — last 10 APRS station positions. Pass Predictor — search a satellite, click it to compute next 5 passes over the map centre.
Hover any FT8 or APRS row to preview its location on the map.
Click the 🏠 button (bottom-right) to save the current map view as home. Click ↺ to snap back. A small orange marker shows your home location.
Great Circle — enable in the menu, then click two points on the map. A geodesic path is drawn with distance (km/mi) and initial bearings from both ends.
Grid locators — shows Maidenhead field boundaries (2-character) and square lines (4-character) with labels across the map.
MUF overlay — colours the map by estimated Maximum Usable Frequency based on real-time SFI data from NOAA. Lighter colours = higher MUF.
With none of those active, click any point on the map to see its Maidenhead grid square, local time, solar elevation, and sunrise/sunset times.
Use the hamburger menu ☰ (top-left) to toggle any overlay or panel off/on. The status bar (bottom-left) shows UTC time and moon phase. Legend (bottom-right) explains the map colours. Sun & Moon default to off to prevent screen burn on static displays.