Classification
- Incident Type: Cargo Loss
- Severity: High
- Primary evidence: Official investigation report extract and Lloyd's List source capture
Vessel Details
| Field | Value |
|---|
| Vessel Name | ONE Apus |
| Vessel Type | Container |
| Flag State | Japan |
| IMO Number | |
| Gross Tonnage | |
| LOA (m) | 364 |
| Breadth (m) | |
| Owner/Operator | |
Incident Details
| Field | Value |
|---|
| Date | 2020-11-30 to 2020-12-01 |
| Location | Off the northwest coast of Niihau Island, Hawaii, United States |
| Region | Pacific Ocean |
| Coordinates | 30.0000, -170.0000 |
| Fatalities | Not reported in the reviewed extracts |
| Injuries | Not reported in the reviewed extracts |
| Missing | Not reported in the reviewed extracts |
| Cargo loss | 1,841 containers lost overboard; 983 additional containers damaged |
| Direct damage | Damage to containers and their securing devices was reported; vessel damage is unresolved |
| Economic damage | Not reported |
Key facts
- Heavy rolling occurred around midnight on 30 November 2020 and again during the early hours of 1 December.
- The two rolling events were approximately 90 minutes apart; the first involved a roll of about 20° and the second involved roll angles of 25° or more.
- The reviewed official report states that the JTSB attributed the loss to rolling conditions that made the vessel vulnerable to parametric rolling.
- The Lloyd's List capture reports a lower, approximate figure of up to 1,900 containers lost, including 40 containing dangerous goods. The difference from the official report's 1,841-container figure is unresolved.
Narrative
ONE Apus was proceeding in heavy weather off the northwest coast of Niihau Island, Hawaii, when it experienced two episodes of heavy rolling. The first episode occurred around midnight on 30 November 2020 and involved rolling of approximately 20°. A second episode followed in the early hours of 1 December, about 90 minutes later, with roll angles of 25° or more. The official report extract records that 1,841 containers were lost overboard and another 983 were damaged. It summarizes the JTSB's conclusion that the vessel was operating in conditions that made it vulnerable to parametric rolling, and that the rolling damaged containers and their securing devices. The accessible Lloyd's List capture gives the reported loss as up to 1,900 containers, including 40 containing dangerous goods, so the final count and dangerous-goods count are not reconciled here. The reviewed extracts do not establish casualties, route details beyond the incident area, vessel damage, pollution, or economic loss.
Sequence of events
| Date or time | Event |
|---|
| Around 2020-11-30 00:00 | First heavy-rolling episode, approximately 20°. |
| About 90 minutes later | Second heavy-rolling episode, with roll angles of 25° or more. |
| 2020-12-01 | Container losses and damage were recorded during the heavy-weather passage. |
Investigation
The official report extract summarizes the JTSB investigation as finding that the roll motions were most likely different from normal hull motions and that the operating conditions made ONE Apus vulnerable to parametric rolling. It identifies the rolling as the mechanism that damaged containers and their securing devices and caused the overboard losses. The reviewed material does not provide the full JTSB report or a complete casualty, damage, pollution, or economic-loss assessment.
References
- Lloyd's List source note
- gCaptain source note
- Transportation Safety Board of Canada, Marine Transportation Safety Investigation Report M21P0297, Appendix E, pp. 112-113.
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Investigation report
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