Which CRG is specifically designated for airfields and aircraft?

The correct designation for the CRG specifically tailored for airfields and aircraft is the Sea Raven. This group is structured to support operations involving airfield management, aircraft recovery, and maintenance, which is crucial for maintaining effective air operations. The Sea Raven serves as a specialized force that possesses the unique capabilities required to handle the complexities of airfield operations, such as rapid deployment and rescue missions, making it well-equipped to manage the unique challenges associated with aircraft and air support in various operational environments.

The other choices, while they may represent groups within the broader framework of naval operational readiness, are not specifically assigned to the specific tasks related to airfields and aircraft. Each CRG has its operational focus, but only the Sea Raven is designated for the specific adaptations and mission profiles needed for effective airfield operation.