What is a necessary action if you need to check the preflight information?

Accessing ATP's online system or photographing sections for review is the necessary action if you need to check the preflight information. This method provides pilots with real-time, accurate, and up-to-date data directly from the source, ensuring that they have the most relevant and current information before flight. ATP’s online system is designed to streamline access to essential preflight documentation, updates, and checklists, which enhances safety and compliance with operational standards. Additionally, storing photographs of crucial sections allows pilots to have immediate access to important details without the need to physically carry a manual onboard, improving efficiency and readiness.

Other options, while potentially useful in certain contexts, do not ensure that the pilot is accessing the most reliable and current information. Using a printed manual may not provide the latest updates or changes that could be relevant for safe operations. Contacting the airline operation center might lead to delays, and asking another pilot for assistance may not guarantee that they have the most accurate or updated information either. Therefore, utilizing ATP's online system is the most effective and reliable choice for accessing preflight information.