What is the best method to ensure successful communication of changes during a flight operation?

Using a standardized communication protocol is the best method to ensure successful communication of changes during a flight operation because it establishes clear and consistent expectations for how information is exchanged among all parties involved. Standardized protocols help to ensure that everyone uses the same terminology and follows the same procedures, which minimizes the risk of miscommunication and misunderstanding. This is especially critical in aviation, where precise information transfer can significantly impact safety and operational efficiency.

In comparison, while visual signals can be effective in certain contexts, they may not be sufficient on their own to convey complex information or when long distances are involved. Informal verbal communication lacks the consistency and reliability that standardized protocols provide, often leading to ambiguity. Additionally, ensuring radio silence is counterproductive in a flight operation where open communication is necessary to coordinate actions and manage safety.