True or False: When the position symbol associated with the data block falls more than one history behind the actual aircraft target or there is no target symbol displayed, the Mode C information in the data block may be used for the purpose of determining separation.

Question

True or False: When the position symbol associated with the data block falls more than one history behind the actual aircraft target or there is no target symbol displayed, the Mode C information in the data block may be used for the purpose of determining separation.

BlackTom AI · Accepted Answer

The question asks us to evaluate a true/false statement about Mode C information and targeting history.
Option: True. If the position symbol behind the target history exceeds one history frame (i.e., falls more than one history behind) or if no target symbol is displayed, the statement suggests you may use Mode C information in the data block to determine separation. This claim would be problematic because Mode C altitude data is not always a reliable determinant of separation in all airspace and surveillance conditions, and relying on data block Mode C in such a degraded display scenario could lead to unsafe conclusions if other surveillance cues are missing or out of date. In many procedures, separation is established using the authoritative surveillance separation data and continuous target tracking; stale history or missing symbols generally require alternative separation assurance methods rather than assuming Mode C in the data block can substitute.

Option: False. By contrast, the safe and standard interpretation is that even if the position symbol is more than one history behind or the target symbol is not displayed, you should not rely on the data block's Mode C as the sole basis for determining separation. Separation must be based on current, verifiable tracking information and procedural guidelines, not outdated or unavailable symbol history or data block altitude alone. The presence of stale history or missing symbols reduces confidence in the target’s current position, velocity, and altitude, so using Mode C information from the data block to determine separation would degrade situational awareness and could lead to unsafe conclusions.

To distinguish the two, focus on the reliability and timeliness of the data: stale history and missing symbols undermine reliability, so the alternative: do not use Mode C data from the data block for separation determination when the symbol history is outdated or missing.

In summary, the statement asserts a use-case (relying on data block Mode C under stale history or missing symbol conditions) that is not appropriate for maintaining safe separation; therefore, the statement is false.

True or False: When the position symbol associated with the data block falls more than one history behind the actual aircraft target or there is no target symbol displayed, the Mode C information in the data block may be used for the purpose of determining separation.True/False

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