A professional tool watch tailored to satisfy the demands of storm chasers, the most eminent specialist being Ball Watch’s ambassador, Dr Joshua Wurman, the Fireman Storm Chaser Pro combines the high-performance services of a chronograph and a telemeter. To determine the distance between an observer and the point of lightning impact, the user starts the chrono as soon as lightning is seen and stops it when thunder is heard. The seconds hand then shows the distance, in kilometres, on the telemetric scale. Like all Ball watches, luminosity and legibility are central to the Fireman Storm Chaser Pro, whose hour-markers and hands are fitted with luminescent micro-tubes containing H3 gas. This technology has no need for an external source of light or energy, and is up to 100 times more effective than conventional luminescent coatings.