Which of the following is an example of a situational awareness technique?

Using mirrors for visibility is indeed a key example of a situational awareness technique. This practice enables drivers to continuously assess their surroundings and be aware of any potential hazards. By effectively utilizing mirrors, a driver can monitor other vehicles, pedestrians, and various road conditions, which is essential in emergency vehicle operations. This awareness is critical for making informed decisions and responding promptly to dynamic situations on the road.

In contrast, the other options do not exemplify situational awareness to the same extent. Ignoring distractions might suggest a focus on driving, but it does not involve actively gathering information from the environment. Maintaining a constant speed is more about driving technique than awareness. Driving with headlights off during the day, particularly in conditions that require visibility, could diminish awareness and safety rather than enhance it. Thus, using mirrors directly contributes to and improves situational awareness, making it the correct choice.