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Bluetooth Tracker on Postcard Exposes Dutch Navy Ship

4/20/2026

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Summary

Story summary

A postcard with a hidden Bluetooth tracker caused the Dutch air-defense frigate HNLMS Evertsen to be unintentionally tracked.
The tracker transmitted the ship's location for about 24 hours before discovery and disablement.
Omroep Gelderland reported the incident and warned that one exposed ship can reveal movements of a larger naval group, prompting the Royal Netherlands Navy to ban greeting cards with batteries and review screening protocols.

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Story summary

A postcard with a hidden Bluetooth tracker caused the Dutch air-defense frigate HNLMS Evertsen to be unintentionally tracked.
The tracker transmitted the ship's location for about 24 hours before discovery and disablement.
Omroep Gelderland reported the incident and warned that one exposed ship can reveal movements of a larger naval group, prompting the Royal Netherlands Navy to ban greeting cards with batteries and review screening protocols.