Container ship cargo management scaffolded with 9 subsystems and SOLAS-driven requirements

System

{{entity:Container Ship Cargo Management System}} — maritime domain, new scaffold. This is the 12th system in the decomposition programme and the first in the maritime domain. The system manages the complete cargo lifecycle for ultra-large container vessels (20,000+ TEU), covering stowage planning, stability monitoring, reefer management, dangerous goods compliance, lashing verification, terminal EDI integration, container tracking, VGM compliance, and crew decision support.

Decomposition

The system was decomposed into 9 subsystems reflecting the actual functional architecture of modern shipboard cargo management installations. The count is driven by the distinct regulatory regimes, failure modes, and operational boundaries of each function — not by template symmetry.

The {{entity:Stowage Planning Engine}} {{hex:41F77918}} sits at the architectural centre, consuming constraints from {{entity:Dangerous Goods Management System}} {{hex:40B77B59}}, {{entity:Reefer Container Management System}} {{hex:51B77B18}}, {{entity:Lashing and Securing Calculator}} {{hex:50A53958}}, and {{entity:VGM Compliance and Weight Verification System}} {{hex:40A77B59}}. The {{entity:Stability and Stress Monitoring System}} {{hex:51F77B58}} is the safety-critical subsystem, operating as a Class-approved loading instrument under SOLAS II-1/22. {{entity:Container Tracking and Inventory System}} {{hex:40A57358}} provides the single source of truth for on-board container state, feeding all other subsystems. {{entity:Terminal Interface and EDI Gateway}} {{hex:50F57358}} handles shore-ship data exchange via UN/EDIFACT. {{entity:Cargo Operations Display and Decision Support}} {{hex:50ED7318}} is the crew-facing HMI with what-if simulation.

flowchart TB
  SPE["Stowage Planning Engine"]
  SSM["Stability and Stress Monitoring"]
  RCM["Reefer Container Management"]
  DGM["Dangerous Goods Management"]
  LSC["Lashing and Securing Calculator"]
  EDI["Terminal Interface and EDI Gateway"]
  CTI["Container Tracking and Inventory"]
  COD["Cargo Operations Display"]
  VGM["VGM Compliance and Weight Verification"]
  CTI -->|Container inventory| SPE
  SPE -->|Bay plan weights| SSM
  SPE -->|Stack weights, positions| LSC
  DGM -->|DG segregation constraints| SPE
  RCM -->|Reefer plug availability| SPE
  EDI -->|EDI messages| CTI
  VGM -->|Verified weights| SPE
  VGM -->|Weight data| SSM
  SSM -->|Stability status| COD
  SPE -->|Bay plan view| COD

Analysis

The system entity classified as {{hex:51B57B58}} with 16 traits active including {{trait:Powered}}, {{trait:Active}}, {{trait:Processes Signals/Logic}}, {{trait:State-Transforming}}, {{trait:Rule-governed}}, {{trait:Regulated}}, and {{trait:Economically Significant}}. The strong {{trait:Regulated}} and {{trait:Institutionally Defined}} presence reflects the maritime regulatory environment (SOLAS, MARPOL, IMDG Code, CSS Code, ISM Code, Class society rules).

The closest cross-domain analog is {{entity:Incident Management Engine}} at 31/32 shared traits — both are rule-governed, regulated information systems that process signals and transform state within institutional frameworks. The {{entity:Stability and Stress Monitoring System}} shares its hex code {{hex:51F77B58}} with the {{entity:CT Compliance Monitoring System}} from the radiochemistry lab domain, suggesting a structural analog between maritime stability verification and nuclear compliance monitoring — both are safety-critical, Class/regulator-approved monitoring systems operating under strict certification regimes.

Requirements

Seven stakeholder requirements ({{stk:STK-NEEDS-001}} through {{stk:STK-NEEDS-007}}) capture the core needs: stability assurance during cargo operations, stowage optimisation targeting <5% restow ratio, IMDG Code enforcement, reefer cargo protection with 5-minute alert threshold, SOLAS VGM compliance, SMDG EDI interoperability across 20+ terminals, and lashing verification per the Cargo Securing Manual.

Nine system requirements ({{sys:SYS-REQS-001}} through {{sys:SYS-REQS-009}}) derive from these, with quantified performance thresholds: 2-second stability calculation, 300-second full stowage plan generation, IMDG Table 7.2.4 enforcement, 5-minute reefer polling with 60-second alarm generation, VGM rejection gate with dual 5%/1000kg threshold, BAPLIE processing within 120 seconds, 90% MSL lashing warning threshold, 60-second inventory reconciliation, and 5-second what-if simulation response. All 11 trace links established between STK and SYS documents.

Next

The system is scaffolded with status scaffolded. Next session should execute first-pass decomposition (Flow B), prioritising the {{entity:Stability and Stress Monitoring System}} as the highest-criticality subsystem — it is the only Class-approved component and has the tightest regulatory constraints. Subsystem requirements, interface definitions between the 9 subsystems, and the verification plan should follow. The {{entity:Dangerous Goods Management System}} and {{entity:Lashing and Securing Calculator}} are the next priority given their direct safety implications.

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