From the source:
MARKET TIME Facility-Cam Ranh Complex. “Market Time” is a coastal patrol operation. There were 6 such installations along the South Vietnam coastline, all relatively self-sufficient. They consisted basically of repair and maintenance shops, floating dry docks, pontoon piers, crane pads, POL storage, utilities, and roads. This is the Market Time site at Cam Ranh Bay.
As naval facilities, all six installations were built by US Navy Seabees.