The National Transportation Safety Board has issued a new recommendation directed at the Federal Aviation Administration. The board advises that the agency revise the Airman's Information Manual to include a specific notice regarding Instrument Landing System signals. This notice would inform pilots that signals for Category I runways are not inspected below 50 feet above ground level. Furthermore, the recommended update would state that guidance signal anomalies may be encountered below that altitude. The goal is to ensure that flight crews are aware of these operational limitations and potential signal irregularities during the final approach phase. This recommendation highlights the need for clearer communication regarding the scope of signal inspection protocols.

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