Lombrum Naval Base, also known as HMPNGS Tarangau and formerly PNG Defence Force Base Lombrum, is a naval military base operated by the Maritime Operations Element of the Papua New Guinea Defence Force (PNGDF). It is located on Manus Island in Papua New Guinea. Lombrum is the home port of the PNGDF's Pacific-class patrol boat force.

The Papua New Guinea Defence Force (PNGDF) is the military organisation responsible for the defence of Papua New Guinea. It originated from the Australian Army land forces of the territory of Papua New Guinea before independence, coming into being in January 1973 and having its antecedents in the Pacific Islands Regiment. The PNGDF is a small force, numbering around 3,600 personnel, and consists of a Land Element, an Air Element and a Maritime Element. It is a joint force tasked with defending Papua New Guinea and its territories against external attack, as well as having secondary functions including national-building and internal security tasks.