PDT Bracelet

Personal Data Transmitter Bracelet seen in Aliens.

A Personal Data Transmitter, also known as a PDT, is a form of personal locator typically surgically implanted into the body of extrasolar colonists, among others.


The purpose of a PDT is to allow rapid location of the associated personnel anywhere within a certain radius of the receiving equipment, sometimes up to 30km distance. They are also capable of relaying rudimentary vital signs regarding the user, although this particular function is known to be subject to malfunction.

The colonists at Hadley's Hope on LV-426 all had PDTs implanted as soon as they arrived on the moon.[1] Colonial Marines were also equipped with PDTs, contained within their M10 Pattern Ballistic Helmets.[2]

For those who did not receive implants, wearable versions of this technology were also made available. The Personal Data Trasmitter Bracelet/Locator Tube Set, also known as a PDT/L, is a two part system, where one piece is a wrist-worn accessory, and the other is its dedicated locator. Limited to a range of under 100 meters, the locator tub digitally displays its proximity to the bracelet and beeps louder as it approaches the transmitter. If the tube is synced to an APT TAC center, full biometric data of the wearer can be accessed.




  1. James Cameron (writer and director). Aliens (1986), 20th Century Fox [DVD].
  2. Aliens vs. Predator, Microsoft Windows version, Rebellion, 2010.