Recognized Organization
Performance Index
Explore Tokyo MoU Recognized Organization performance rankings based on inspections, RO-responsible detentions and statistical performance indicators.
Higher-performing Recognized Organizations.
Intermediate statistical performance.
Lower-performing Recognized Organizations.
| Rank | Recognized Organization | Inspections 2023–2025 | RO Detentions RO-responsible | Detention Rate Calculated % | Low / Medium Limit | Medium / High Limit | Excess Factor | Performance |
|---|---|---|---|---|---|---|---|---|
| 1 | China Classification Society | 9,686 | 3 |
0.03%
|
217 | 171 | -1.96 | High |
| 2 | American Bureau of Shipping | 13,009 | 10 |
0.08%
|
287 | 233 | -1.91 | High |
| 3 | KOREAN REGISTER | 8,836 | 8 |
0.09%
|
199 | 155 | -1.88 | High |
| 4 | DNV AS | 22,513 | 29 |
0.13%
|
485 | 415 | -1.85 | High |
| 5 | Lloyd's Register | 15,291 | 26 |
0.17%
|
335 | 277 | -1.80 | High |
| 6 | Bureau Veritas | 13,511 | 29 |
0.21%
|
297 | 243 | -1.75 | High |
| 7 | Nippon Kaiji Kyokai | 31,877 | 76 |
0.24%
|
679 | 596 | -1.74 | High |
| 8 | RINA Services S.p.A. | 5,876 | 14 |
0.24%
|
136 | 99 | -1.69 | High |
| 9 | CR Classification Society | 421 | 0 |
0.00%
|
14 | 3 | -1.41 | High |
| 10 | Vietnam Register | 2,538 | 14 |
0.55%
|
63 | 39 | -1.15 | High |
| 11 | Isthmus Bureau of Shipping S.A | 1,984 | 14 |
0.71%
|
50 | 29 | -0.88 | High |
| 12 | Russian Maritime Register of Shipping | 689 | 3 |
0.44%
|
20 | 7 | -0.82 | High |
| 13 | Intermaritime Certification Services | 3,660 | 37 |
1.01%
|
88 | 59 | -0.67 | High |
| 14 | Panama Maritime Documentation Services | 2,522 | 30 |
1.19%
|
63 | 38 | -0.38 | High |
| 15 | Overseas Marine Certification Services | 2,876 | 38 |
1.32%
|
70 | 45 | -0.26 | High |
| 16 | Indian Register of Shipping | 594 | 5 |
0.84%
|
18 | 6 | -0.18 | High |
| 17 | Biro Klasifikasi Indonesia | 552 | 5 |
0.91%
|
17 | 5 | -0.03 | High |
| Rank | Recognized Organization | Inspections 2023–2025 | RO Detentions RO-responsible | Detention Rate Calculated % | Low / Medium Limit | Medium / High Limit | Excess Factor | Performance |
|---|---|---|---|---|---|---|---|---|
| 18 | Macosnar Corporation | 240 | 1 |
0.42%
|
9 | 1 | 0.03 | Medium |
| 19 | New United International Marine Services Ltd | 223 | 3 |
1.35%
|
8 | 1 | 0.31 | Medium |
| 20 | Dromon Bureau of Shipping | 270 | 4 |
1.48%
|
10 | 1 | 0.34 | Medium |
| 21 | Polish Register of Shipping | 264 | 5 |
1.89%
|
10 | 1 | 0.47 | Medium |
| 22 | International Classification Bureau Class | 79 | 2 |
2.53%
|
4 | 0 | 0.58 | Medium |
| 23 | Sing-Lloyd | 60 | 2 |
3.33%
|
3 | 0 | 0.68 | Medium |
| 24 | Foresight Ship Classification | 180 | 5 |
2.78%
|
7 | 0 | 0.69 | Medium |
| 25 | International Register of Shipping | 760 | 19 |
2.50%
|
22 | 8 | 0.78 | Medium |
| 26 | Phoenix Register of Shipping | 152 | 5 |
3.29%
|
6 | 0 | 0.79 | Medium |
| 27 | International Ship Classification | 60 | 3 |
5.00%
|
3 | 0 | 0.89 | Medium |
| 28 | Universal Maritime Bureau Ltd | 851 | 24 |
2.82%
|
24 | 10 | 0.98 | Medium |
| Rank | Recognized Organization | Inspections 2023–2025 | RO Detentions RO-responsible | Detention Rate Calculated % | Low / Medium Limit | Medium / High Limit | Excess Factor | Performance |
|---|---|---|---|---|---|---|---|---|
| 29 | Asia Shipping Certification Services | 240 | 9 |
3.75%
|
9 | 1 | 1.04 | Low |
| 30 | Union Bureau of Shipping | 651 | 27 |
4.15%
|
19 | 7 | 1.98 | Low |
| 31 | Cosmos Marine Bureau | 431 | 22 |
5.10%
|
14 | 3 | 2.53 | Low |
Why Does RO Performance Matter?
Recognized Organization performance is relevant to Port State Control risk assessment. It should be considered alongside flag, company and vessel inspection history.
RO Detention Rate
A calculated ratio of RO-responsible detentions to overall inspections during the reporting period.
This is not the official Excess Factor.
Excess Factor
The official statistical indicator used to evaluate RO performance. It is not equivalent to the simple detention percentage.
Performance Categories
Tokyo MoU classifies the listed ROs into three performance groups.
Source: Tokyo MoU Recognized Organization Performance List 2025. Valid from 1 July 2026 to 30 June 2027. Inspection and RO-responsible detention figures cover 2023–2025. All 31 Recognized Organizations and their official statistical values are included. For easier comparison, ShipRegistration.org displays the organizations from best to worst performance, beginning with China Classification Society (Rank 1). The official source presents the list in the opposite order. Detention Rate (%) is independently calculated by ShipRegistration.org. It is not the official Tokyo MoU Excess Factor.