Live vehicle position updates for aircraft

Background

ADS-B is how most of the data is provided.
Limiting Aircraft Data Displayed (LADD) allows some aircraft to hide part of their data from online.
- One way to work around it is to use ADSB-Exchange. [explanation]
- ADS-B Exchange crowdsources its data from many people having a personal ADS-B receiver.
- For more, see ADSBExchange's "Isn't this a security risk?" section here.