When using the flash to bang method of distance determination, how many meters per second do you multiply by the number of seconds between the time the round impacts and the time the sound reaches the observer?

The flash to bang method of distance determination utilizes the speed of sound to estimate how far away an explosion or artillery round has impacted based on the observed gap between the flash of light (the explosion) and the sound of the explosion reaching the observer. The correct multiplier in this scenario is 350 meters per second, which reflects the approximate speed of sound in air at average atmospheric conditions.

Using this method, you count the number of seconds between seeing the flash and hearing the bang, then multiply that number by 350. This calculation provides a reliable estimate of the distance in meters from the observer to the point of impact.

This specific speed is crucial because it accurately converts time (in seconds) into distance (in meters) based on how sound travels through the air. Other speed values do not align with the established average speed of sound in typical conditions, making them inappropriate for this measurement.