In many competitions the pilots have experienced that during a competition - both Precision Flying and Navigation Flying -
all human senses except the hearing are very tense.
Hearing is generally used only for engine controlling or for communication. This consideration forced the “Deutscher Präzisionsflug Verein” in the past to develop a mechanical – electronically Time Voice Box whose “voice” announced the
time in minutes and seconds every fifteen seconds.
With this devise the pilot was released from monitoring time
and could concentrate on more important subjects.
The Time Voice Box’s functions electronically and the built in processor offers several possibilities to show and to announce
the time ( local time - elapsed time ).