Recent developments at the Navy Precision Optical Interferometer (NPOI)

Instrumentation developments at the Navy Precision Optical Interferometer (NPOI, formerly "Navy Optical Interferometer," and "Navy Prototype Optical Interferometer") since the last SPIE meeting in 2010 are summarized. The commissioning of new siderostat stations, progress towards the installation of four 1.8m telescopes, and other instrumentation and control systems upgrades, are reviewed.