Hasnt been updated for a while, i doubt it still works
This plugin sends GPS signals to all players for grids that they are within the configured range of, for example with the default config, a grid over 10k PCU will always broadcast to players within 20km when the !transmit command is used.
!transmit - sends the signals
!radar reload - reloads the config
Make an essentials auto command to trigger the signals when you want