Paris MoU vs Tokyo MoU
The two largest port-state-control regimes. How their geography, targeting, white/grey/black lists, and inspector culture differ — and what that means for the ship you're sailing on.
Side-by-side
| Criterion | Paris MoU 27 member states — Europe + Canada | Tokyo MoU 21 member states — Asia + Pacific |
|---|---|---|
| Geographic coverage | Atlantic Europe + Mediterranean + Canada | Asia-Pacific (Japan, Korea, China, Australia, NZ, Indonesia, etc.) |
| Inspection regime | NIR (New Inspection Regime) — risk-based targeting | Risk-based targeting via the APCIS database |
| Publishing | Annual white/grey/black list + monthly detention list | Annual white/grey/black list + monthly detention list |
| Detention threshold | Strict — deficiencies grouped by severity, detentions for safety-critical findings | Strict — broadly aligned with Paris |
| Inspector culture | Detailed, document-heavy, ISM-aware | Detailed, often more operational-spot-check |
| Flag-state impact | Drives flag's white/grey/black-list ranking globally | Drives flag's white/grey/black-list ranking globally |
| Notable strict ports | Rotterdam, Antwerp, Hamburg, Le Havre, Felixstowe | Tokyo, Yokohama, Singapore, Shanghai, Sydney, Melbourne |
Who each suits
- Paris MoU
Officers sailing Europe / Mediterranean trades. Strong document discipline + ISM compliance pays off here. PSC inspections frequent on grey/black-list flag vessels.
- Tokyo MoU
Officers sailing Asia-Pacific. Operational-readiness focus — fire-fighting, lifesaving, watertight integrity. AMSA (Australia) is particularly stringent.
Pros and cons
Paris MoU
Pros
- Transparent risk-based targeting.
- Predictable inspection patterns.
- Strong feedback loop with class + flag.
Cons
- Document-heavy inspections can exhaust the crew.
- European ports are expensive — detention = serious owner cost.
Tokyo MoU
Pros
- Broad coverage of Asia-Pacific trade.
- Operational focus catches real-world deficiencies.
- AMSA's enforcement has improved safety culture globally.
Cons
- Less linguistic + cultural consistency across member states.
- China + some smaller members vary in inspection depth.
Common misunderstandings
- 'Each MoU has its own list.' The MoUs publish their own white/grey/black lists, but flag-state reputation tracks across both — bad in Paris is usually bad in Tokyo too.
- 'Tokyo is laxer than Paris.' Not on AMSA + JCG inspections — those are at the top of the strictness scale.
- 'A detention only matters in the MoU it happened in.' Detentions follow the vessel + flag globally in PSC databases.
FAQ
- What about USCG, BS MoU, Riyadh MoU?
- USCG runs its own PSC regime independent of the MoUs. Black Sea MoU + Riyadh MoU + Mediterranean MoU + Indian Ocean MoU + Caribbean MoU + Vina del Mar (Latin America) + West & Central Africa MoU cover regional waters. Paris + Tokyo are the largest two by inspection volume.
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