Range Safety was a department, division, or position within Starfleet's Fleet Operations Center on Earth.
In January of 2155, Starfleet officers R. Calvaruso and E. Williams worked in (or as) Range Safety. (ENT: "Demons" set artwork)
Range Safety was seen on directory listings seen on the set of "Demons".
, like many of the other divisions, departments, or positions on the listing, is a reference to NASA