18 April 2026

Today in Failed OpSec

I am not sure what the most important role to ensure security on a war ship, not I'm pretty sure that number 2 on the list is promptly check your physical mail for GPS trackers.

Militaries around the world spend countless hours training, developing policies, and implementing best operational security practices, so imagine the size of the egg on the face of the Dutch navy when journalists managed to track one of its warships for less than the cost of some hagelslag and a coffee.

The security snafu was reported by Dutch regional broadcaster Omroep Gelderland. In a Thursday report, Omroep Gelderland journalist Just Vervaart said the broadcaster was able to track HNLMS Evertsen, a Dutch air-defense frigate deployed to help protect France’s aircraft carrier Charles de Gaulle against missile threats, by mailing a Bluetooth tracker concealed in a postcard to the ship.

Per Vervaart, the Dutch Ministry of Defence makes it easy to send mail and packages to soldiers and sailors in the Dutch armed forces and posts full instructions online. It's that freely available open-source intelligence data that Vervaart was able to use to send the tracker to the Evertsen. 

 Oopsie!

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