CIMSEC – The maritime sector’s cybersecurity gaps are typically framed as a defensive problem – vessels at risk of attack, operations vulnerable to disruption. This framing, while accurate, is incomplete.

The unwitting fleet is not merely vulnerable. It is already functioning as adversary intelligence infrastructure. Thousands of vessels transit strategic waters broadcasting position, transmitting communications through exploitable links, and maintaining connections to shoreside networks – all without security adequate to the operating environment.

The commercial fleet provides positioning, sensors, and connectivity. Operators maintain the infrastructure and pay the bills. Collection requires only the will and skill to access what is already exposed.

A vessel does not need to be gray-hulled to present intelligence value – or strategic risk. Naval and intelligence communities attentive to military communications security should extend that awareness to the unwitting fleet operating every day on the world’s oceans.