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, about 27 kilometers per hour. A common abbreviation is a pizar (pi-zar). This is all trivial though, for simplicity mph and kmh will be used. The speed limit that requires zoran to go faster is roughly 68 Artons per hour (~200 billion kilometers 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. 1 femtoarton is a common, smaller, unit of measurement, roughly 31 feet. A common abbreviation is femar (fay-mr). Again, for simplicity, feet and meters will be used.