Final answer:
VMGR-252 is the squadron that does NOT fall under the MACG as it provides aerial refueling and air transport, aligning with a Marine Aircraft Group rather than a Marine Air Control Group.
Step-by-step explanation:
The Marine Air Control Group (MACG) is a component of the United States Marine Corps aviation unit. Its primary mission is to provide command and control capabilities related to aviation during combat operations. To answer the question about which squadron does NOT fall under the MACG, we need to look at the units typically within a MACG's structure.
The options given in the question are:
- VMGR-252 (Marine Aerial Refueler Transport Squadron)
- MWCS-18 (Marine Wing Communications Squadron)
- VMM-263 (Marine Medium Tiltrotor Squadron)
- MACS-2 (Marine Air Control Squadron)
Among these, the squadron that does not typically fall under the structure of a Marine Air Control Group is VMGR-252, since this unit provides aerial refueling and air transport, which aligns with the missions of a Marine Aircraft Group (MAG) rather than a MACG.