What must be established when departing from a satellite airport in Class C airspace?

When departing from a satellite airport in Class C airspace, it is essential to establish two-way communication with the appropriate ATC facility. This requirement ensures that the pilot is able to receive instructions and provide position reports, thereby contributing to the overall safety and efficiency of operations within the controlled airspace.

In Class C airspace, the primary goal is to maintain safe distances between aircraft and to provide a seamless flow of traffic. Establishing two-way communication allows ATC to give instructions regarding departure routes, altitudes, and any potential traffic conflicts. Additionally, it enables the pilot to confirm understanding and compliance with ATC's directions.

The other options do not correctly identify the requirement for departing from a satellite airport within Class C airspace. For example, engaging with the nearest tower or seeking clearance from Center are not specific protocols that govern all Class C departures, and while reporting a position may be useful, it does not replace the requirement for two-way communication for departure. Hence, the correct emphasis on two-way communication with the ATC facility is fundamental to safe operations in such airspace.