If you're referring to the pneumatic network, one of the footnotes mentions a latency of 10 seconds, but the author does the math and says that's probably not a

If you're referring to the pneumatic network, one of the footnotes mentions a latency of 10 seconds, but the author does the math and says that's probably not accurate, more like 58 seconds at the 20km max distance. http://www.douglas-self.com/MUSEUM/COMMS/airclock/airclock.htm http://www.douglas-self.com/MUSEUM/COMMS/airclock/airclock.h...