What angle should the current nozzle be tilted to during ground turn pattern tests?

The nozzle should be tilted at a 30° angle with the horizon during ground turn pattern tests for optimal performance and coverage. This specific angle is designed to achieve a balance between adequate reach and the ability to cover the intended surface area effectively. At this angle, the water can create an effective pattern that maximizes the dispersion and control of the firefighting agents being utilized, which is crucial in a firefighting scenario.

This inclination not only helps in effectively disbursing the water but also allows for better penetration into the target area, such as an aircraft, ensuring that the fire is tackled from the most advantageous position. Other angles, while potentially useful in different contexts, do not optimize the parameters needed during ground turn patterns in an ARFF context.