Which of the following is NOT a form of reconnaissance?

Surveillance Recon is not typically classified as a form of reconnaissance in the same way that the other options are. Reconnaissance primarily involves gathering specific information about a designated area or target, which is characterized by systematic observation and collection of data.

Area Recon focuses on gathering intelligence over a specific geographic area to identify enemy forces and other relevant information. Zone Recon involves examining larger sections, often more encompassing, to gather broader intelligence. Special Recon is directed at collecting specific and detailed information that may require specialized techniques or equipment.

In contrast, surveillance typically implies ongoing or continuous observation rather than the targeted and often time-sensitive collection of information specific to reconnaissance operations. While surveillance can support reconnaissance efforts by providing additional context, it does not directly fulfill the role of reconnaissance, which aims for specific knowledge in support of tactical or strategic decisions.