If LLWAS receives no data from one or more sensors, what will the tower cab display indicate on the affected lines?

• A. NO DATA
• B. COMM DOWN
• C. COMM ERROR
• D. COMM DOWN (SENSOR)

Answer: (C)

LLWAS communicates the status of each wind-sensor line by flagging data reception problems directly on the affected line. When data from one or more sensors isn’t arriving reliably, the display uses COMM ERROR to indicate a problem with the data stream for those lines. This label specifically points to an issue with receiving or interpreting the sensor data, rather than a complete loss of the entire communication link to the system or a completely down sensor. The other statuses imply different conditions: a total lack of data across the line, a full communication link failure, or a sensor being down. So, the scenario of missing data from sensors is best described as COMM ERROR.