Navy Precision Optical Interferometer (NPOI) is a Observatory located in Flagstaff, AZ 86001. It is one of the 47 observatories in United States. Address of Navy Precision Optical Interferometer (NPOI) is Anderson Mesa, Flagstaff, AZ 86001, United States. Navy Precision Optical Interferometer (NPOI) can be contacted at 19287734868. Navy Precision Optical Interferometer (NPOI) is located in a remote area, with less than 1 listed places around it. Navy Precision Optical Interferometer (NPOI) is rated 4.5 (out of 5 stars) by 4 reviewers on the web.