Which of the following is NOT a passive search technique used in water rescue?

The correct choice is swift water simulation because it does not qualify as a passive search technique. In water rescue operations, passive search techniques are geared towards gathering information and locating victims without the use of active methods or direct intervention in the water.

Spotters involve trained personnel observing from a vantage point for signs of distress or victims in the water, while a shoreline search for clues is a systematic examination of the banks of a waterway for evidence or indications of a missing person, both of which are passive observations.

Interviewing witnesses is another passive technique, as it relies on gathering information about the situation from individuals who may have seen the incident or have knowledge of the area.

In contrast, swift water simulation involves active engagement in controlled environments to mimic conditions of swift water rescue, which typically includes direct interaction with the water to practice skills rather than merely observing or gathering information. This makes it a technique focused on training rather than searching.