Black Vulmea
SOC-12
The original TL D scout cruiser in EA5 is based on Gateway Domain circa 993 to 1000, a century before the "classic," "Golden Age" OTU. It seems reasonable that if IISS liked the design that they would upgrade it to TL E or F in the intervening years.Myself, I prefer the TL15 version for the jump-4.
That said, IMTU the TL D Norton Qasar-class is an out-of-date design compared to the Donnies, in service past its prime, retained for deep-space exploration along the trailing frontier due to its long legs.