Dutch test exposes warship tracking via mail

A Dutch journalistic investigation has exposed a security vulnerability in military mail screening by successfully tracking a warship using a simple, inexpensive device. Investigators from Omroep Brabant hid a €5 Bluetooth tracking tag inside a letter, which was then mailed to a French frigate escorting the aircraft carrier Charles de Gaulle across the Mediterranean. The device transmitted its location for weeks, allowing the journalists to follow the ship's movements before it was eventually discovered. The experiment demonstrates how adversaries could potentially exploit postal systems to monitor naval assets.