Introduction to Ship Systems
Learn the fundamentals of modern ship systems — integrated bridge systems, ECDIS, engine automation, onboard networks, CBS, and IACS E26-compliant architectures.
Ship Systems covers the full technology stack of modern commercial vessels — from integrated bridge systems and ECDIS to engine automation, cargo management, CBS (computer-based systems), and onboard IT/OT networks. Posts are written by maritime engineers and cybersecurity professionals with hands-on shipboard experience.
Last reviewed: August 2026 | Editorial & Verification Policy
Key Ship System Categories
Electronic chart display, conning displays, AIS/ARPA integration, voyage planning. Mandatory under SOLAS. Subject to IACS UR E26 cyber requirements.
Integrated automation systems (IAS), engine monitoring, remote control, shaft power monitoring, fuel consumption optimization, IEC 62443-aligned OT security.
IACS UR E26 defines CBS as any onboard computer-based system affecting safety, propulsion, or cargo. All CBS must be inventoried, assessed, and protected under the cyber resilience plan.
Ship LAN/VLAN design, OT network segmentation, firewall architecture per IACS UR E26, NMEA 0183/2000 data buses, satellite connectivity (VSAT, 5G).
Fire detection, public address, general alarm, fixed gas/fire suppression systems, and GMDSS communications — all within IACS E26 cyber scope for newbuildings.
Cargo control and monitoring systems, ballast water management (BWMS per IMO D-2), loading computer systems, and tank gauging automation.
Frequently Asked Questions — Ship Systems
What does IACS UR E26 require for ship systems?
IACS UR E26 (effective 1 July 2024) requires all newbuilding contracts to include cyber resilience measures across shipboard systems. This covers asset inventory and classification, network segmentation, security zones and conduits, access control, software patch management, and security incident response procedures.
What is a CBS (Computer-Based System) in maritime?
CBS is the IACS UR E26 term for any onboard system using computer hardware and software — navigation displays, engine management systems, ballast control, cargo systems, and more. All CBS must be inventoried, risk-assessed, and protected as part of the vessel's cyber resilience plan.
What is NMEA 2000 and why does it matter for ship cybersecurity?
NMEA 2000 (IEC 61162-3) is the CAN-bus based navigation data network used by bridge instruments. Without proper network segmentation, a compromised NMEA 2000 node could inject false navigation data. IACS UR E26 specifically addresses protection of navigation-critical data buses.
📚 Article index — 39 posts
- Anti-Heeling: When One Sensor Moves Hundreds of Tonnes · 2026-09-18
Anti-Heeling: When One Sensor Moves Hundreds of Tonnes How a system no regulation demands ends up holding one of the most direct physical authority… - Crude Oil Washing: The System That Rules Built · 2026-09-15
Crude Oil Washing: The System That Rules Built Five component rows, four typologies, and a safety case the system does not own Julius Shin Maritime… - Hold Washing: When Clean Is Defined by Contract · 2026-09-12
Hold Washing: When Clean Is Defined by Contract The completion criterion for this system is written in a charterparty, not a regulation — and that… - LNG Carriers: When Boiling Cargo Designs the Ship · 2026-09-10
LNG Carriers: When Boiling Cargo Designs the Ship What it carries, how it is laid out, what it repeats, and who inspects it Julius Shin Maritime… - Cargo Tank Level Gauging: One Number, Two Paths · 2026-09-10
Cargo Tank Level Gauging: One Number, Two Paths A radar gauge observes and informs. Nothing else. So why does the rulebook build a wall down the… - Gas Bunkering: A Safety Function Across Two Hulls · 2026-09-01
Gas Bunkering: A Safety Function Across Two Hulls When the trust boundary is not the hull but the coupling face between two ships, what does a zone… - The Loading Computer: Architecture, Interaction & Authority in Ship Loading Systems · 2026-08-26
The Loading Computer: Architecture, Interactions, Cybersecurity Why a system that controls nothing can still sink a ship Julius Shin Maritime… - Beyond E26 Paperwork: Building Sustainable Ship Cybersecurity Engineering (Ch.9) · 2026-08-06
<!--════════════════════════════════════════════════════════════ Article: Ch.09 — Maritime Cybersecurity as a Discipline Series : Why Maritime… - How Cyber Engineering Information Flows from Supplier to Class in a Newbuild (Ch.8) · 2026-07-26
<!--════════════════════════════════════════════════════════════ Article: Ch.08 — How Engineering Information Flows Through a Project Series : Why… - What Engineering Evidence UR E26/E27 Approval Actually Requires (Ch.6) · 2026-07-05
<!--══ - Ship Communication Systems · 2026-07-04
Ship Communication Systems: A Complete Technical Overview Introduction · Regulatory Requirements · Performance Standards · Constraints · Market… - Secure Vendor Remote Access (SVRA) for Ships: The Jump Server Approach to Eliminating Vendor Backdoors · 2026-07-04
Secure Vendor Remote Access (SVRA) for Ships: The Jump Server Approach to Eliminating Vendor Backdoors Eliminating permanent vendor backdoors on… - OT Vulnerability Management for Ships · 2026-07-04
OT Vulnerability Management for Ships: Complete Technical Guide Identifying, prioritising, and managing known vulnerabilities in shipboard OT systems… - Ship Ballast Water Management Systems · 2026-07-01
Ship Ballast Water Management Systems: A Complete Technical Overview Introduction · Regulatory Requirements · Performance Standards · Constraints ·… - Ship Alarm Monitoring · 2026-07-01
Ship Alarm Monitoring & Control Systems: A Complete Technical Overview Introduction · Regulatory Requirements · Performance Standards · Constraints ·… - From Functional to Explainable Design: What UR E26 Reviewers Expect (Ch.5) · 2026-06-28
- Why IACS Introduced UR E26 and E27: The Engineering Gap They Close (Ch.4) · 2026-06-27
<!--════════════════════════════════════════════════════════════ Article: Why Maritime Cybersecurity Became a System Engineering Issue (4/9) Chapter… - Ship Cybersecurity Is a System Engineering Problem, Not an IT Add-On (Ch.3) · 2026-06-16
- Why Shipboard OT Interdependency Turns One Failure into Many (Ch.2) · 2026-06-07
- Ship Cargo Management Systems · 2026-06-06
Ship Cargo Management Systems: A Complete Technical Overview Introduction · Regulatory Requirements · Performance Standards · Constraints · Market… - OT Patch Management for Ships · 2026-06-06
OT Patch Management for Ships: Safe Deployment in Constrained Maritime Environments Structured processes for receiving, testing, and applying… - Maritime OT/IT Firewall · 2026-06-06
Maritime OT/IT Firewall: Complete Technical Guide Enforcing network zone boundaries on ships — OT protocol inspection, IACS UR E26 segmentation… - L2/L3 Network Switch Security for Ships · 2026-06-06
L2/L3 Network Switch Security for Ships: Segmentation, Hardening & OT Zone Control How managed L2 and L3 switches form the physical backbone of… - How Ship Digitalization Created the Cyber Risk Behind IACS UR E26 (Ch.1) · 2026-06-01
Chapter 1. - Ship Network Monitoring Systems (NMS) · 2026-05-31
Ship Network Monitoring Systems (NMS): A Complete Technical Overview Architecture · Regulatory Requirements · Performance Standards · Constraints ·… - OT Remote Access Authentication (OTRAA) for Ships · 2026-05-09
OT Remote Access Authentication (OTRAA) for Ships: Complete Technical Guide Strong authentication for industrial control systems in shipboard… - Ship Fire Detection & Suppression Systems · 2026-05-01
Ship Fire Detection & Suppression Systems: A Complete Technical Overview Introduction · Regulatory Requirements · Performance Standards · Constraints… - OT Asset Management for Ships · 2026-04-11
OT Asset Management for Ships: Complete Technical Guide Building and maintaining the complete OT asset inventory required by IACS UR E26 — automated… - Multi-Factor Authentication (MFA) for Ships · 2026-04-11
Multi-Factor Authentication (MFA) for Ships: Complete Technical Guide Implementing phishing-resistant authentication on shipboard OT/IT systems —… - Maritime Threat Intelligence · 2026-04-11
Maritime Threat Intelligence: Complete Technical Guide Current threat actor knowledge for shipboard OT/IT defence — maritime-specific IoC feeds,… - Privileged Access Management (PAM) for Ships · 2026-03-28
Privileged Access Management (PAM) for Ships: Complete Technical Guide Controlling, monitoring, and auditing privileged access to shipboard OT/IT… - Ship Power Management Systems · 2026-03-21
Ship Power Management Systems: A Complete Technical Overview Introduction · Regulatory Requirements · Performance Standards · Constraints · Market… - Network Detection & Response (NDR) for Ships · 2026-03-07
Network Detection & Response (NDR) for Ships: Complete Technical Guide Extending IDS with automated response capability on shipboard networks —… - Ship Propulsion Systems · 2026-03-01
Ship Propulsion Systems: A Complete Technical Overview Introduction · Regulatory Requirements · Performance Standards · Constraints · Market Trends —… - Ship Engine Room Automation Systems · 2026-02-28
Ship Engine Room Automation Systems: A Complete Technical Overview Introduction · Regulatory Requirements · Performance Standards · Constraints ·… - Intrusion Detection System (IDS) for Ships · 2026-02-08
Intrusion Detection System (IDS) for Ships: Complete Technical Guide Passive OT-aware network monitoring for shipboard attack detection — IACS UR E26… - Ship Navigation Systems · 2026-02-02
Ship Navigation Systems: A Complete Technical Overview Introduction · Regulatory Requirements · Performance Standards · Constraints · Market Trends —… - SIEM Integration for Ships · 2026-01-03
SIEM Integration for Ships: Complete Technical Guide Aggregating and correlating security events across shipboard OT/IT systems — maritime log… - Jump Server (Bastion Host) for Ships · 2025-11-01
Jump Server (Bastion Host) for Ships: Complete Technical Guide The single controlled gateway for all remote access to shipboard OT/IT systems —…
Ship Systems — Vessel Technology & Cybersecurity
Ship Systems covers the design, integration, and cybersecurity of onboard vessel systems under IACS UR E26/E27 requirements. Articles address navigation systems (ECDIS, AIS, GPS, radar), propulsion and engine controls, cargo management systems, integrated bridge systems, ship communication networks (GMDSS, VSAT, Starlink), loading computers, and engineering information flows during ship construction. Special focus is given to how each system class must be identified, documented, and protected in compliance with current class society rules. Whether you are a shipowner, classification surveyor, shipyard engineer, or OT security professional, this section provides practical insight into how systems are classified and what security controls apply.
Topics Covered
- IACS UR E26 System Classification
- Navigation Systems — ECDIS, AIS, GPS
- Loading Computer Architecture
- Ship Communication Systems
- Propulsion & Engine Control
- Cargo Management Systems
- Integrated Bridge Systems
- GMDSS & VSAT
- Engineering Documentation
- OT Security for Ship Systems
- Class Survey Requirements
- Cyber Resilience Design
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