Personal data transmitter (Earth-7149)

A personal data transmitter (PDT) is a personal locator surgically implanted on the body of humans for the rapid location of civilians, criminals and other elements anywhere within 30 kilometers. Among the tracked information, there are bank accounts and personal identity.

In addition, all illegal immigrants are considered "off the grid"; because they do not have PDTs, they cannot keep bank accounts, and many resort to illegal activities to survive and resort to other currencies outside of credits.

During the Battle of Aegis VII, the inhabitants of Hadley's Hope, Aegis VII, were located by the 2nd Battalion Bravo Team on the colony's Atmosphere Processing Plant, only for the Marines to discover they had been cocooned into xenomorph hives.