From the FASA Star Trek ROMULAN SHIP RECOGNITION MANUAL, circa 1985
CS-2 (Graceful Flyer) Class V Courier
Known Sphere Of Operation: Empire-wide
Data Reliability: A
Major Data Source: Type 10 vessel in Starfleet possession; captured Romulan data.
The ships in this class were used for long-range courier missions for many years.  Carrying light armament, they were used extensively along the Federation borders and in the Triangle.  Because they can sustain Warp 7 speeds, they have been used as V.I.P. transport throughout the Empire.
        About Stardate 1/8608, the CS-2 Type 2 was introduced into service to replace the Type 1; though quite suitable for its role, its weapons systems were light, a trend that continued until the introduction of the Type 6 about Stardate 1/9804.  This newer model carried an upgraded beam weapon and mounted a more powerful engine; existing vessels of Type 2 through 5 were not refitted, but were relegated to duties within the Empire.  Types 7 through 9 showed cosmetic changes to the Type 6, but about Stardate 2/0510, the Type 10 was introduced with new-style shields and more powerful weapons and engines.  Vessels in this class were put into the reserve fleets about Stardate 2/14.
        Of the approximately 300 built, about 150 currently serve in the reserve fleet.  It is known that at least 90 have been sold to the private sector; one Type 5, one Type 7, and one Type 10 operate exclusively within the Triangle.
        Named for the Romulan verelan vastarum (graceful flyer), a Romulan bird know for its ability to glide gracefully for hours at a time, these ships are common along the borders of the Empire, though they normally are not involved in military missions.