What term describes an action used to achieve an objective in search strategies?

The term that best describes an action used to achieve an objective in search strategies is "tactic." In the context of search operations, tactics are specific actions or maneuvers employed to execute a broader strategy. They are the practical steps taken to achieve immediate goals within the framework of a larger plan. For example, in a search and rescue operation, tactics might include deploying drones for aerial surveys or setting up ground teams in specific areas.

In contrast, the other terms refer more to broader or systemic frameworks. A strategy refers to the overarching plan aimed at achieving long-term goals, encompassing multiple tactics. A procedure is generally a set process that outlines the steps needed to complete an operation, providing a structured approach but not necessarily focusing on the dynamic actions taken. A method describes a systematic way of doing something but is often more related to techniques rather than actions aimed at achieving specific objectives in a tactical context.

Thus, "tactic" is the precise term for actions taken in search strategies to meet defined objectives effectively.