Broadcasts

In aviation, a broadcast is a one-way radio transmission intended for all aircraft within a specific area rather than a single station. Unlike directed transmissions (e.g., tower-to-aircraft), broadcasts are general announcements and do not require or expect a response.

Broadcasts are used to:

• Provide situational awareness to all pilots in the vicinity
• Share non-selective information, such as traffic, weather, or airspace status
• Replace ATC instructions in uncontrolled airspace or where no ATC is present

• “All stations, this is Vöslau Information: parachuting in progress at drop zone 3.”
• “All stations, Linz traffic, D-EMFG entering left downwind runway 08.”
• “All stations, bird activity reported at Salzburg, 500 ft AGL, vicinity of the threshold runway 15.”

Pilots are expected to broadcast when:

• Operating in uncontrolled airspace (Class G)
• Entering or crossing an RMZ (Radio Mandatory Zone)
• Approaching or departing non-towered aerodromes
• Performing position reports en route in remote areas

Key elements to include:

• Call sign
• Position
• Altitude
• Intentions
• Relevant time or heading info

Example:
“All stations, D-ABCD, overhead Krems at 2500 feet, descending to join right downwind runway 11.”

• ✅ Keep it brief and clear
• ✅ Use standard phraseology
• ✅ Include only essential information
• ❌ Do not expect a reply
• ❌ Do not use slang or regional dialect

Broadcasts do not replace ATC instructions where ATC is available. They are intended for self-separation and coordination in shared airspace without active control.