What is the purpose of a CSOSS reference board or reference card?

• A. To provide quick, concise procedure steps and reference data needed to perform a sequence without flipping through multiple manuals
• B. To log maintenance history
• C. To serve as a decorative item
• D. To display weather charts

Answer: (C)

The main idea is to give operators immediate, reliable access to the exact steps and data needed to execute a sequence without flipping through multiple manuals. A CSOSS reference board or reference card condenses the critical procedures, required settings, limits, and quick cross-references onto a single, durable display mounted at the control station. This lets a crew follow the correct order of actions under time pressure, verify the proper data (like switch positions, rates, or signals), and know where to look for more detail if something needs deeper review. It supports consistency and speed in performing system sequences, which is essential for safe and effective operation in real-world or training scenarios.

Not fitting options include maintenance history logs, which are kept in separate records; decorative items, which serve no operational purpose; and weather charts, which are not related to performing system sequences.