U.S. Army Field Manual 34-2-1 (1991)

This field manual provides tactics, techniques, and procedures (TTP) for reconnaissance and surveillance (R&S) planning, mission management, and reporting. It provides TTP for the development of intelligence to support counterreconnaissance (CR) operations. It describes employment considerations for R&S assets; and defines the roles of the collection manager and maneuver brigade and battalion S2's in planning R&S operations. It describes their roles in identifying intelligence requirements to support CR operations.

http://www.enlisted.info/field-manuals/fm-34-2-1-TTP-for-reconnaissance-surveillance-and-intelligence-support-to-counterreconnaissance.shtml

1-1 Success on the battlefield begins with R&S [reconnaissance and surveillance] and R&S begins with the intelligence officer.

1-3 Receiving and analyzing requirements means identifying what the commander must know about the enemy, weather, and terrain to accomplish the mission... Once you have identified all requirements, you will eventually convert them into specific items to look for.

1-6 Be sure to incorporate flexibility into your R&S plan. Be ready to make modifications at any time

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