Which component dictates 17347 usage?

• A. Main body weather
• B. RMKs section
• C. Destination METAR
• D. Altitude weather

Answer: (A)

What dictates 17347 usage is the main body weather because it contains the essential observed data that drive immediate operational decisions. The main body includes the core elements like wind, visibility, weather phenomena, sky condition, temperature/dew point, and altimeter—the facts you rely on for how a procedure or product is used in real time. The remarks section adds supplementary details that can clarify or enhance interpretation, but they don’t establish the primary basis for usage. The destination METAR provides weather information for the arrival airport and is useful for planning, not for determining how 17347 should be used. Altitude weather isn’t a standard, primary component for dictating usage in this context.