Filter by Activator
The filter works inversely - selected activators will be hidden from the map. All other bunkers will remain visible.
- Click on an activator to deselect it (bunkers with this activator will be hidden)
- All activators are initially selected (all bunkers are visible)
- Deselected activators are shown in gray (bunkers with them are hidden)
- Callsigns with prefix or suffix (e.g. OM/OK2IKT, OK2IKT/P) are automatically unified
Filter by Year
The filter works inversely - selected years will be hidden from the map. All other bunkers will remain visible.
- Click on a year to deselect it (bunkers activated in this year will be hidden)
- All years are initially selected (all bunkers are visible)
- Deselected years are shown in gray (bunkers activated in these years are hidden)
Reset All
The "Reset All" button clears all filters and displays all bunkers on the map.
