TIS-B fills your ADS-B In display with radar-derived traffic, but a 15-nautical-mile 'hockey puck' service volume and 12-second radar lag create gaps most pilots don't know exist.
ADS-B's unauthenticated broadcast protocol allows anyone with accessible hardware to inject false traffic into cockpit displays - a known vulnerability with no near-term regulatory fix.
TIS-B relays radar targets to your ADS-B display with up to 15-second latency, and ground station coverage disappears below 3,000–10,000 feet depending on terrain.
TIS-B targets on your ADS-B display are radar-relayed, not direct broadcasts - carrying up to 12 seconds of latency that can place traffic half a mile from where it appears.
TIS-B uplinks radar-derived traffic to ADS-B In receivers, but its position accuracy and latency differ significantly from direct ADS-B targets - and most pilots don't know the difference.
TIS-B fills ADS-B traffic display gaps using FAA radar data, but latency, coverage holes, and non-transponder aircraft create blind spots every pilot must understand.