ECDIS risks, without the jargon.

ECDIS, or electronic chart display and information system, is the digital charting station on the bridge. It is a computer running specialized software, connected to GPS, radar, and sometimes the autopilot and propulsion interfaces.

Because it is a computer on a network, it inherits everything computers inherit: unpatched software, weak credentials, and exposure to anything else on that network that is compromised.

Display manipulation. Corrupted or spoofed chart data that shows the vessel somewhere it is not, the classic GPS spoofing scenario.

Network infection. An ECDIS unit reachable from a compromised VSAT terminal or a crew laptop carrying malware.

Denial of service. A device that stops charting mid-passage because it was rebooted, locked, or rendered inoperable remotely.

All three are real. All three are also far less common than the headlines suggest, and all three are substantially mitigated by basic network hygiene.

1. Segment the network. Bridge OT should not share a flat network with crew Wi-Fi or the VSAT LAN. This one change prevents most of the attack paths.

2. Change defaults. ECDIS units and their management interfaces ship with default credentials. Change them at commissioning.

3. Patch on schedule. Vendors release updates for chart software and the underlying OS. They only help when installed.

4. Keep the offline playbooks. Your crew should know what to do if a display freezes mid-voyage. The Haris crew app puts those steps in their pocket.

The most dramatic ECDIS attack scenarios require an attacker who is already deep inside your network. Stop them at the door, with segmentation, credentials, and patching, and the horror stories mostly stop mattering.