Equipment & Vehicles
Homing Device Tracker
Tb1 trackig device
Type: Personal tracker
Affiliation: Thunderbird 1
Main Operator: Scott Tracy
Appearances: The Duchess Assignment

The Homing Device Tracker is one of the many features in Thunderbird 1.

Scott Tracy used it to track the Duchess when she is kidnapped by Chandler and Brophy in The Duchess Assignment. The homing device itself is hidden in the St. Christopher brooch the Duchess of Royston receives a from Lady Penelope Creighton-Ward before leaving for America on the Fireflash.