What is the Op Spec that governs VFR departures when IFR clearance cannot be obtained?

The correct Op Spec that governs VFR departures when IFR clearance cannot be obtained is indeed C077. This operational specification provides guidance for pilots on how to safely conduct VFR departures in circumstances when obtaining an IFR clearance is not possible. Specifically, it outlines the procedures and considerations necessary for flying under visual flight rules (VFR) when transitioning to or from instrument flight rules (IFR) operations.

C077 ensures that pilots are aware of the limitations and requirements associated with making VFR departures from an airport, including communication protocols with air traffic control, weather minimums, and appropriate flight path planning to maintain safety while navigating through controlled airspace. Understanding this specification is crucial for pilots as it helps them stay compliant with regulations while ensuring safe operational practices.

In contrast, the other options—C082, C093, and C099—address different aspects of operational specifications and do not pertain specifically to the VFR departure procedures under the scenario described. Thus, C077 stands out as the relevant guideline for this situation.