What call could the remote PIC/visual observer make on CTAF to alert the manned pilot when a manned aircraft is approaching near the operation area?

What call could the remote PIC/visual observer make on CTAF to alert the manned pilot when a manned aircraft is approaching near the operation area?

• A. Zephyrhills traffic, unmanned aircraft Xray Yankee Zulu, operating five NM south of the airport at or below 400 AGL, located at the three o'clock position of the Cessna just north of our position, Zephyrhills traffic.
• B. Attention all pilots.
• C. Unmanned aircraft Xray Yankee Zulu in the area.
• D. Traffic advisory.

Answer: (A)

When coordinating with a manned aircraft on CTAF, the crucial idea is to broadcast precise, unambiguous traffic information so nearby pilots can visualize where you are and how you’re moving. The best call does three things at once: it identifies who you are, pins down your exact position and altitude, and places you in relation to another aircraft or a known reference so the pilot can quickly locate you. The strongest choice does this by saying who you are and what you’re doing (the unmanned aircraft with its call sign) and giving a complete picture: you’re five nautical miles south of the airport, at or below 400 feet AGL, and you’re at the three o’clock position of a Cessna that’s north of your own position. That last bit—relative bearing to a reference aircraft—lets the manned pilot visualize where you are in relation to the Cessna and to themselves. Including the airport reference (distance from the airport) and your altitude helps the other pilot determine if you’re on a collision course and what actions to take. Other options fall short because they’re too vague to be actionable in a high-workload airspace situation: they don’t provide your exact location, distance, or altitude, or they fail to identify which traffic you’re referring to. The clear, specific format in this call is what enables quick and safe awareness by the manned pilot.

When coordinating with a manned aircraft on CTAF, the crucial idea is to broadcast precise, unambiguous traffic information so nearby pilots can visualize where you are and how you’re moving. The best call does three things at once: it identifies who you are, pins down your exact position and altitude, and places you in relation to another aircraft or a known reference so the pilot can quickly locate you.

The strongest choice does this by saying who you are and what you’re doing (the unmanned aircraft with its call sign) and giving a complete picture: you’re five nautical miles south of the airport, at or below 400 feet AGL, and you’re at the three o’clock position of a Cessna that’s north of your own position. That last bit—relative bearing to a reference aircraft—lets the manned pilot visualize where you are in relation to the Cessna and to themselves. Including the airport reference (distance from the airport) and your altitude helps the other pilot determine if you’re on a collision course and what actions to take.

Other options fall short because they’re too vague to be actionable in a high-workload airspace situation: they don’t provide your exact location, distance, or altitude, or they fail to identify which traffic you’re referring to. The clear, specific format in this call is what enables quick and safe awareness by the manned pilot.