This paper discusses the Navy program for infrared focal plane array (IR FPA) development as well as several ultimate IR FPA system applications. Of particular interest are applications involving missile seekers, threat warning, and search and track. Advantages of IR systems as Navy sensors are discussed, as are problems involved with developing high-performance IR FPAs. Emphasis is placed on specific IR FPA technologies currently being developed as part of the Navy program. These technologies include both hybrid and monolithic arrays (charge-coupled devices, charge-injection devices, and charge-imaging matrix devices). Other technologies are also discussed.