What must a pilot do before starting any IFR flight?

Before starting any IFR flight, it is essential for a pilot to familiarize themselves with conditions and approaches. This involves understanding the airport's current weather, the specific approach procedures, and any potential obstacles or airspace limitations that may affect the planned flight. By reviewing this information, pilots can ensure they are prepared for the flight and able to make informed decisions in various situations.

This preparation is crucial because IFR operations often involve flying in low visibility conditions, which requires a deep understanding of the approaches to be used, holding patterns, and any specific procedures that might be in place for the airspace. Being familiar with the conditions and approaches increases situational awareness and enhances safety throughout the flight.

The other options, while important components of flight planning and safety, do not encompass the same level of focus on the specific conditions and procedures that directly impact the IFR flight.