Speed is measured in multiple units. An Arton is the distance across the Arton Nebula, roughly 3 light years, and is also the main unit of astronomical distance. 1 Sarton is 1 Arton per year. A more common version is the picosarton (1*10^ten trillion), which equates to roughly 17 miles per hour. A common abbreviation is a pisar (pee-sar). The speed limit that requires zoran to go faster is roughly 68 Artons per hour, the Pronn Limit. Speed past this is measured in Pronns.
Again, an Arton is the distance across the Arton Nebula, which is roughly 3 light years, the main long distance astronomical distance. 1 femtoarton is a common, smaller, unit of measurement, roughly 31 feet. A common abbreviation is femar (feh-mar).