Traffic Information Service (TIS) provides information to the flight deck via data link using the S-mode transponder and altitude encoder to improve see-and-avoid. Which option best describes this service?

• A. A radar derived tool from ATC
• B. A ground-based service providing information to the flight deck via data link using the S-mode transponder and altitude encoder to inform of nearby traffic
• C. An onboard weather interpretation console
• D. A flight planning tool for route minimization

Answer: (D)

Traffic Information Service is about delivering traffic data to the cockpit to enhance see-and-avoid. It’s a ground-based service that broadcasts information to the flight deck over a data link, using the transponder and altitude data to identify nearby aircraft. Pilots receive this traffic information to understand where other airplanes are relative to their own position and altitude, improving situational awareness and collision avoidance.

This isn't a radar-derived tool from ATC in the cockpit, nor an onboard weather interpretation system, nor a flight planning tool. It specifically provides nearby traffic information via data link from ground systems to the pilot.