In the previous article, The Most Vulnerable System Onboard Is Human, we argued that the most vulnerable system onboard is not technical—it is human. Not because crews are careless, but because they operate complex digital systems under real operational pressure, often within environments that were never designed with usability in mind.
Maritime cybersecurity discussions often focus on tools, policies, and training. Yet most cyber incidents at sea still originate in everyday human actions—actions taken not out of negligence, but out of necessity.
Crews operate complex digital systems under operational pressure, fatigue, and time constraints. When those systems are difficult to access, poorly explained, or misaligned with real workflows, unsafe shortcuts become inevitable.
This checklist shifts the focus from what crews know to how systems support—or undermine—safe behavior onboard.
It is not a compliance checklist.
It is a practical audit of cyber-usability.
1. Access & Authentication – Reducing Friction
The more complex access becomes, the more likely crews are to bypass it.
Audit questions:
- Do crew members manage multiple independent credentials across bridge, engine, and administrative systems—or do they have a single, coherent digital identity?
- Are password policies realistic in an operational environment, or do they drive unsafe practices like written passwords near terminals?
- Is access provisioned automatically based on rank and role, or are shared “Master” or “Admin” accounts still used for convenience?
- Are contractors, riding squads, and vendors given time-limited, role-specific access, or are permanent credentials reused?
What to look for:
Shared accounts, persistent vendor access, and excessive credential complexity are signals of design failure—not crew failure.
2. Network Segmentation – Separating Work from Life
Crews do not think in terms of VLANs or firewalls. They believe in terms of work and life.
Audit questions:
- Is crew welfare connectivity physically or logically isolated, with no routable path into navigation or engine networks?
- Are critical USB ports on bridge and engine systems physically blocked or software-restricted?
- Is there a clear, approved process for scanning personal devices before they enter semi-secure areas?
- Is remote access terminated in a controlled zone, or does it land directly inside operational networks?
- Are crew and operational traffic managed through prioritization, or does congestion lead to unsafe behavior?
What to look for:
If separation is unclear or congestion is routine, unsafe workarounds are not a matter of if, but when.
3. Interface & System Design – Managing Cognitive Load
Under stress, crews do not read manuals. They respond to signals.
Audit questions:
- Are cybersecurity alerts clearly distinguishable from operational alarms, or does everything present as a critical warning?
- When a security control blocks an action, does the system explain why in plain language—or does it display cryptic error codes?
- Is there a clear, practiced procedure to isolate systems and revert to manual operation if a cyber anomaly is suspected?
- Do different systems present security warnings consistently, or does each vendor follow its own logic?
What to look for:
Inconsistent interfaces and unclear messaging increase cognitive load—and increase risk during time-critical operations.
4. Workflow Integration – Design vs. Reality
Crews will always choose the fastest path that allows them to do their job.
Audit questions:
- Is there an official, easy-to-use method for transferring files such as port documents, chart updates, and reports from shore to ship?
- When officers rotate, is there a digital handover process that ensures credentials are issued immediately?
- Is there a no-blame reporting culture for cyber near-misses, such as clicking a suspicious link?
- In emergencies, is there a defined and logged exception process—or do crews bypass controls informally?
What to look for:
If the “official” workflow is harder than the workaround, the workaround will win.
5. Training & Drills – Beyond the Slide Deck
Training only works when it reflects reality.
Audit questions:
- Do cyber drills involve actual ship systems (e.g., frozen ECDIS, loss of automation), or are they confined to tabletop exercises?
- Are crews trained to operate in degraded digital modes, not just total system failure?
- Is it clear who on board has the authority to isolate systems during a suspected cyber incident?
- Have shore-side IT or cybersecurity teams spent time onboard to observe real operational usage?
What to look for:
If drills do not reflect real workflows, they will not shape real behavior.
6. Culture & Feedback – Closing the Loop
Cyber resilience cannot improve if feedback disappears into a void.
Audit questions:
- Is there a structured channel for crews to report that a cyber control is impractical?
- Are cyber near-misses treated as learning opportunities?
- Have any controls or procedures been modified in response to crew feedback?
What to look for:
If nothing ever changes, reporting stops.
Final Thoughts: Human-Centric Design Is a Cyber Control
Human cyber risk is not eliminated through stricter rules or more training slides. It is reduced when systems are designed around how people actually work at sea.
This checklist is not about assigning blame.
It is about identifying where design choices create friction, and where friction creates risk.
The vessels that will be most resilient in the years ahead will not be those with the most tools, but those with the cleanest, most usable digital environments onboard.
Cybersecurity, ultimately, is not just a technical discipline.
It is a human one.