Navigation
1400 E. Clement Street
Baltimore,
Maryland,
United States
410-685-5068
This practical and easy to understand workbook supports the owner, Master and the ship's crew with cyber security risk management.
It contains comprehensive checklists to support the day-to-day management of onboard cyber security and facilitates collaboration between ships, onshore IT departments and equipment manufacturers.
Cyber risk management should be an inherent part of safety and security and should be considered at all levels of the company, including senior management ashore and onboard personnel.
This Workbook has been designed as a practical, straightforward guide to support the Master and officers on board ship (Part I - Onboard Practical Considerations). It is designed to facilitate understanding and good collaboration between individual ships, onshore IT departments and equipment manufacturers (Part II - Shore Management Considerations). The Workbook may also be useful to the wider maritime industry.
The 8th edition has been produced by Witherbys, BIMCO and the International Chamber of Shipping (ICS).
The Workbook has been fully revised and updated and contains new guidance on:
Detailed case studies and diagrams have been added to help illustrate cyber risks. The Workbook contains 13 checklists and 6 annexes, including Cyber Security Risk Assessment and Creating a Cyber Security Plan.
Building on the latest ‘Guidelines on Cyber Security Onboard Ships’ (Version 5), the ‘Cyber Security Workbook for On Board Ship Use’ goes one step further and translates the high-level guidelines into operational tools and checklists for use on board ships. The Workbook is an indispensable complement to the Guidelines and is highly recommended reading for ship officers and shore staff with a cyber security risk management role.
David Loosley
Secretary General and CEO
BIMCO
Cyber attacks on shipping are escalating at an alarming pace and are exposing a threat the international maritime community cannot afford to ignore. Each year, vessels grow more sophisticated and closely connected to networks ashore. While this connectivity brings real operational and welfare benefits, such as connecting seafarers more reliably with companies and families at home, it also gives attackers more chances to cause harm. A single cyber attack can cut a whole fleet off from shore communication. A systems breach at a port can expose reams of sensitive operational data. The potential for serious disruptions to global trade underscores how essential vigilant cyber security is to shipping.
The advent of artificial intelligence (AI) makes this threat graver still. Generative AI tools give attackers the ability to automate reconnaissance and repackage malware at a speed and scale that manual methods cannot match. Simultaneously, GNSS spoofing and jamming are a daily hazard in some of the world’s busiest waters. It is deeply concerning that seafarers must now navigate with the knowledge that the very signals guiding their vessels may not be reliable.
However, the growing awareness of this threat and our industry’s ability to counter it is encouraging. The IMO’s ‘Guidelines on Maritime Cyber Risk Management’, most recently revised in 2025, continue to anchor cyber risk within safety management systems. European Union and the United States regulators also give this obligation greater force by strengthening cyber security obligations across industry stakeholders. Together with updated cyber security standards from Classification Societies and insurers, these measures have brought cyber resilience into the regulatory and commercial mainstream.
As those who wish to disrupt the safe movement of ships continue to sharpen their methods, the industry must keep pace through rigorous risk assessment and sustained training. This Workbook aims to serve as a trusted companion to seafarers and shore-based colleagues alike, helping them understand this threat and safeguard maritime trade for the benefit of all nations.
Thomas A. Kazakos
Secretary General
International Chamber of Shipping
Foreword
Abbreviations/Definitions
Introduction
Section 1 - Regulations and Guidance
1.1 IMO Requirements
1.1.1 Designated Roles and Responsibilities
1.2 ‘The Guidelines on Cyber Security Onboard Ships’
1.3 Additional Industry Guidelines
1.3.1 International Association of Classification Societies (IACS)
1.3.2 Non-governmental Organisations (NGOs)
1.4 Regional Regulatory Guidance
1.4.1 UK
1.4.2 EU
1.4.3 USA
1.5 Guidance on Mitigation Strategies for IT
1.5.1 Essential Eight Maturity Model
1.5.2 Cyber Essentials
1.5.3 IMO Insider Threat Toolkit
Part One - Onboard Practical Considerations
Section 2 - Identifying Risks
2.1 Vulnerable Ship Systems
2.2 What is a Maritime Cyber Attack?
2.3 Phases of a Cyber Attack
2.4 Threats
2.5 Types of Cyber Attack
2.6 Social Engineering
2.6.1 Tailgating
2.6.2 Email Phishing
2.6.3 Spear Phishing
2.6.4 Man-in-the-middle (MITM) Attacks
2.6.5 Phone or Text Messages
2.6.6 QR Code Phishing
2.6.7 Multi-factor Authentication (MFA) Phishing
2.7 Ransomware
2.8 Use of Artificial Intelligence
2.8.1 Significant AI Developments in 2026
2.8.2 Automated Network Reconnaissance
2.8.3 Advanced Evasion and Bypassing Defences
2.8.4 Precision Targeting and Process Manipulation
2.8.5 AI-enhanced Social Engineering
2.8.6 AI Used as a Defensive Tool
Section 3 - Protection and Prevention: General Principles
3.1 Prevention of Malware Attacks
3.2 Software Updates
3.2.1 Updating the Operating System (OS)
3.2.2 Updating Programs that are not Part of the Operating System
3.3 Endpoint Protection/Security Suite
3.3.1 Endpoint Protection Updates
3.3.2 Checking Whether the Endpoint Protection Suite is Up to Date
3.4 Passwords
3.4.1 Creating Passwords
3.4.2 Password Length
3.4.3 Managing Passwords
3.4.4 Handover of Passwords
3.4.5 Passkeys
3.4.6 Usernames
3.5 Cyber Security and the Safety Management System (SMS)
3.5.1 Cyber Security and the Ship Security Plan (SSP)
3.6 Ship Inspections and Port State Control (PSC)
3.6.1 Focus of Inspections
3.6.2 US Port State Control
3.6.3 European Union
3.6.4 Other Inspections
Section 4 - Crew Considerations and Training
4.1 Key Aspects of Crew Training
4.2 Cyber Security Familiarisation for Crew
4.3 Training for Non-crewmembers
4.4 Designing a Training Programme
4.5 Unintentional Cyber Breaches by the Crew
4.6 Planning a Crew Training Session
4.7 Cyber Security Drills
4.7.1 Generic Ship Drill Scenario for On Board Ship
4.7.2 Combined Ship/Office Drill
4.8 Social Media
4.9 Travelling in Cyber Safe Mode
Section 5 - Detect, Respond and Recover: General Principles
5.1 Detecting a Cyber Incident
5.1.1 Introduction
5.1.2 Useful Tools Available to Help Detect Possible Malware
5.2 Incident Response
5.2.1 Third-party Support
5.2.2 Cyber Recovery Plan
5.2.3 Cyber Security Incident Report
5.2.4 Backups
Section 6 - External Communications and Cyber Security in Port
6.1 Satellite Communications (Satcom) Equipment
6.1.1 Satcom Passwords
6.1.2 Satcom Visibility on the Public Internet
6.1.3 Satcom Software Updates
6.1.4 Physical Security of the Satellite Terminal
6.1.5 Software Security of the Satellite System
6.2 Cyber Security Risks in Port
6.2.1 Mobile (Cellular) Data Connections
6.2.2 Connecting to Shore WiFi in Port
6.2.3 Port Cyber Attacks
6.2.4 Drone Threats
6.3 Agents
Section 7 - Ship’s Business Systems
7.1 Network Segregation On Board
7.1.1 Segregated Networks
7.1.2 Achieving a Segregated Network
7.1.3 Maintaining a Segregated Network
7.1.4 Benefits of Network Segregation
7.1.5 Vulnerable Systems On Board
7.1.6 Defence in Depth and Breadth
7.2 Wireless Networks On Board
7.2.1 Business WiFi
7.2.2 Crew WiFi
7.2.3 Guest Access
7.2.4 WiFi Network Security
7.2.5 Virtual Private Network (VPN)
7.3 Onboard Business Computers
7.3.1 USB Ports and Drives
7.3.2 USB Port Blockers
7.3.3 USB Cleaning Stations
7.3.4 Tablets
7.3.5 Personal Devices and USB Ports
7.3.6 Configuring Business Computers to Minimise the Risks of Cyber Attack
7.4 Passenger Ship Systems
7.4.1 Passenger Services
7.4.2 Other Considerations
Section 8 - OT Systems
8.1 Understanding OT Systems
8.2 Engine Department Considerations
8.3 Cargo Management
8.4 ECDIS Security
8.4.1 Updates
8.4.2 Physical Security
8.4.3 ECDIS Recovery
8.4.4 Recognising Genuine NAVTEX Messages
8.4.5 Digital Navigational Data System (NAVDAT)
8.5 GNSS Security
8.5.1 Introduction
8.5.2 Examples of GNSS Jamming/Spoofing
8.5.3 Technical Protections Against GNSS Jamming/Spoofing
8.5.4 Procedures to Protect Against GNSS Jamming/Spoofing
8.5.5 GNSS Data on the NMEA Bus
8.6 Other Bridge Systems
8.6.1 Voyage Data Recorder (VDR)
8.6.2 Automatic Identification System (AIS)
Part Two - Shore Management Considerations
Section 9 - Key Considerations
9.1 Cooperation Between the Office Departments and their Suppliers
9.1.1 IT Department and Technical Department - ‘Secure by Design’
9.1.2 Securing the Supply Chain
9.1.3 Company Cyber Security Working Group
9.2 Cooperation Between the Office and the Ship’s Crew
9.2.1 Maritime Cyber Security Management
9.2.2 Cyber Security and the Safety Management System (SMS)
9.2.3 Cyber Security and the Ship Security Plan (SSP)
9.2.4 Onboard Resources According to Ship Type
9.3 Ship’s Network Architecture
9.3.1 Industrial Demilitarised Zone (IDMZ)
9.3.2 Data Diodes (Unidirectional Gateways)
Section 10 - OT Systems Management
10.1 OT Asset Management and Risk Assessment
10.1.1 Asset Management
10.1.2 Asset Risk Assessment
10.2 Securing OT Systems
10.3 Securing the Ethernet IP Network Used by OT Systems
10.3.1 Converter Security
10.4 Intrusion Detection Systems (IDS)
Section 11 - IT Systems Management
11.1 Remote Access
11.1.1 Protection Measures
11.2 Vulnerability Scanning (Cyber Audit)
11.2.1 Performing a Vulnerability Scan
11.3 Penetration (Pen) Testing
11.3.1 Carrying Out a Pen Test
11.3.2 Benefits of a Pen Test
11.4 Endpoint Security Management
11.4.1 Endpoint Detection and Response (EDR)
11.4.2 Extended Detection and Response (XDR)
11.4.3 Comparing EDR and XDR
11.5 Disaster Recovery from Backup
11.5.1 Backup Strategy
11.6 Uninterruptible Power Supply (UPS) for IT/OT Systems
Checklists
Checklist 1 - Cyber Security Familiarisation for New Crewmembers
Checklist 2 - Cyber Security Crew Training
Checklist 3 - Detecting a Cyber Incident
Checklist 4 - Responding to a Cyber Incident On Board
Checklist 5 - Onboard Business Computer
Checklist 6 - Network Segregation
Checklist 7 - Networks (Wireless and Wired)
Checklist 8 - Satellite Communications
Checklist 9 - OT Systems Initial Inspection
Checklist 10 - ECDIS Cyber Security
Checklist 11 - Cyber Security Checks on the Navigation Bridge
Checklist 12 - Asset Management and Risk Assessment
Checklist 13 - Remote Access
Annexes
Annex 1 - Cyber Security Assessment
Annex 2 - Creating a Cyber Security Plan
Annex 3 - Example Reporting Form
Annex 4 - Ship Cyber Security Officer Appointment Letter
Annex 5 - Creating User Accounts
Annex 6 - Checking for Segregated Networks
Annex 7 - NMEA 0183
Annex 8 - Further Resources
About the Author
Witherbys
Witherbys titles are developed using scripts developed by technical experts that are peer reviewed within work groups. Typically, they seek to improve understanding of the regulations, recommendations and guidelines issued by Industry.
Witherbys staff have significant expertise in the fields of navigation and hazardous cargoes as well as in the presentation of complex subjects in a graphic and easy to understand manner.
BIMCO
Facilitating trade is at the very heart of our business, and since 1905, we've helped our members keep world trade moving. We make it our business to help our members with theirs.
BIMCO members cover 64% of the world's tonnage and consist of local, global, small and large companies. We are an organisation and global shipping community of 2,100 members in 120 countries.
From our offices in Athens, Brussels, Copenhagen, Houston, London, Shanghai and Singapore we aim to help build a resilient industry in a sustainable future whilst protecting world trade. We do this by finding practical solutions for our members to help them manage risk in a changing world.
To find out more, please visit About BIMCO
ICS
The International Chamber of Shipping (ICS) is the global trade association representing national shipowners' associations from Asia, Africa, the Americas and Europe and more than 80% of the world merchant fleet. Established in 1921, ICS is concerned with all aspects of maritime affairs particularly maritime safety, environmental protection, maritime law and employment affairs. ICS enjoys consultative status with the UN International Maritime Organization (IMO) and International Labour Organization (ILO).
ICS also develops best practices and guidance, including a wide range of publications and free resources that are used by ship operators globally.
https://www.ics-shipping.org/about-ics/