In German fire stations a gong announcement is used instead of a loud siren indoors, alerting the watch to a specific vehicle and call type. HH stands for Hamburg, HLF is the standard rescue tender, and RTW is an ambulance, while a Löschzug is the combined fire attack unit that turns out together. Recordings of these distinct station gongs spread through emergency service forums, simulator communities and roleplay groups, where fans use them to recreate authentic Hamburg turnouts rather than generic alarm scenes.