When is the best time to perform a search and rescue operation based on time elapsed?

The first hour after a person goes missing is considered the most critical period for conducting a search and rescue operation. This immediate timeframe is when the likelihood of successfully locating the individual is at its highest, as the victim may still be in the vicinity of their last known location and may not have drifted far away if they are in water or lost on land.

Rapid response can also improve the chances of survival, especially in situations where the missing person may be in a vulnerable state or require immediate assistance due to environmental conditions. The urgency of acting swiftly means that resources should be mobilized right away to gather information, deploy personnel, and search the area effectively.

The other options do not reflect this urgency. Waiting until after 24 hours reduces the chances of finding the individual, as critical evidence and locations may become more difficult to track over time. The second hour, though still important, does not leverage the peak time of opportunity that the first hour represents. Finally, establishing a thorough search area is critical but should occur concurrently with immediate search efforts instead of being a prerequisite for action.