Confidence at sea is never granted. It is earned the moment something goes wrong.

Information alone settles nothing. Someone must still show that it can be trusted and that the vessel is ready to act on it.

Those who lead the fleet are measured by what they can prove in rough weather.

A cyber incident does not have to damage a ship to stop it. It only has to make the crew unsure about what they can trust. A master who cannot rely on propulsion control or cargo tank readings has no sound basis to continue an approach, and a terminal has no sound basis to begin discharge.

That is the useful turn in Yonghyun Jo's argument. Resilience is not judged by how well an attack is repelled. It is judged by whether the vessel can keep safe control and then prove it is fit to resume work. Detection and clean-up are only half the job. The other half is evidence.

The industry has built a good deal of vocabulary around prevention. It has built far less around the hours or days between an incident and a documented return to service. In that gap, berths are lost, pilots and tugs are rebooked and specialists are flown in. The cost sits in the voyages that follow, not in the replaced computer.

The industry problem is that proof is rarely prepared in advance. Network drawings are out of date. Remote access arrangements are unclear. Crews know how to restart a system but not how to show that a protective function works afterwards. A successful reboot proves very little about whether cargo operations are safe.

The assessment data adds weight. CYTUR found that 94% of the systems it assessed fell in the Appropriate or Required treatment categories under IACS Recommendation 171. The figure covers a sample and cannot be applied to the world fleet, but it shows that gaps in assessed vessels are not rare.

This matters most to owners of ships already trading, where large changes wait for a maintenance window. Jo's practical answer is modest and useful. Trace the routes an intruder could take. Review who holds remote access. Rehearse recovery. Ask each vessel team what evidence it would need before restarting an affected operation.

Cybersecurity here is a marine safety matter and a commercial one. Owners who can answer that last point quickly will lose less time. Those who cannot will find out in port.

Maritime IT teams are being asked to support more systems, more users and higher expectations for uptime and security, often without a corresponding increase in internal resources.

Quazar is Navarino’s IT-as-a-service platform, providing a structured way to manage onboard and shore-side IT environments. It covers areas including infrastructure, endpoint management, lifecycle planning and support, while allowing operators to retain flexibility rather than adopt a rigid, one-size-fits-all model.

For fleet and IT managers, the value is practical: less time spent firefighting routine issues, and more capacity to focus on longer-term digital priorities, with maritime-specific expertise and global support behind the service.

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