Regula I

Spacelab Regula I was a Federation research station located in orbit of the Class D planetoid Regula on the edge of the Mutara Nebula. In the 2280s, Regula I operated under the direction of Dr. Carol Marcus during the development of Project Genesis. (Star Trek II: The Wrath of Khan)

Over the course of a century, the station would be more or less abandonned, except for the odd science, salvage and historical teams. In 2383, Section 31 stationed a group of persuaded Corps of Engineers and Erik Pressman to develop another interphase cloaking device. Being under the guise of Section 31 drove Erik Pressman mad, so he sabatoged the cloaking device in a way that would blow the external sensor control in the Operations centre when he planned to be working there - thus his death was faked, and he escaped on a shuttle into Regula's secret cavern without notice.

Three days later, the USS Phoenix-X would arrive to have the cloaking device installed at the station. (PNX: "These Aren't the Voyages...")