When applying water to a fire in a tanker, what is a recommended practice?

Directing water above the level of the contained liquid is the recommended practice when applying water to a fire in a tanker. This technique is crucial because it takes into account the potential for the flammable liquid to vaporize and ignite if water is applied directly to the flames or the liquid surface. By directing the water above, it allows the water to create a curtain of water vapor that can cool the superheated gases and help prevent the spread of fire while also avoiding the direct agitation of the flammable liquid, which could lead to splashing or further ignition.

This approach effectively helps control the fire's heat and reduces the risk of a flashover or escalation, as it creates a barrier to the flames without directly disturbing the burning material or creating more hazardous conditions. Utilizing this tactic ensures that safety is prioritized, particularly when dealing with volatile substances that could present a significant risk if not managed carefully.