Which is a disadvantage of ground recovery?

The choice that identifies a disadvantage of ground recovery is indeed related to the necessity for increased security. Ground recovery operations often take place in contested environments where enemy forces can engage. This situation inherently requires robust security measures to protect personnel and equipment during the recovery process.

Ground recovery methods don't benefit from the aerial vantage point that can provide real-time situational awareness or quick response options, which can lead to an increased vulnerability and the potential for enemy engagement during the recovery operation. As forces operate on the ground, they are at greater risk than if they were utilizing aerial methods.

In contrast, elements like being weather independent or having reduced enemy detection are not disadvantages. These factors can actually be seen as advantages, as ground operations can be planned to continue despite adverse weather conditions, and once underway, can potentially utilize terrain and tactical cover to reduce enemy detection. Additionally, while aerial support may enhance ground recovery operations, it is not deemed a strict necessity; operations can be conducted without it, albeit with increased risk and planning considerations.