This incident was reported by IMCA and concerns the discovery of a missing access hatch on a vessel’s communication dome during a routine inspection. The event highlighted critical issues in hatch securing mechanisms and the potential hazard of dropped objects.
What Happened
During a scheduled safety inspection of the vessel’s main mast, it was discovered that the access hatch to one of the communication domes had detached and fallen off. Further inspection revealed that the hatch’s secondary securing method had failed. This created a significant risk, as environmental forces such as strong winds could have resulted in the hatch falling and causing injury or structural damage.
Why It Happened
The primary securing mechanism of the hatch was inadequately designed and had failed. The secondary securing method, a lanyard, was undersized and unsuitable for the weight and dimensions of the hatch. The lanyard was attached using adhesive pads, which detached under load, providing no effective backup.
Actions Taken
A comprehensive inspection of all communication dome hatch securing systems was initiated to ensure proper fastening. Primary securing mechanisms are being upgraded by fitting mounting bolts and nuts with spring washers or alternative anti-loosening features. Secondary securing systems are being replaced with robust, mechanically fixed wire lanyards or chains rated for the hatch’s weight and environmental conditions. A detailed dropped object prevention survey was conducted, and communication dome hatches are now included in planned maintenance routines, especially in areas exposed to high wind or vibration. Work procedures were updated to include double-checking of hatch security after any maintenance, applicable to both crew and external technicians.
Lessons Learned
- Always verify that both primary and secondary securing mechanisms are fit for purpose and rated for the specific load and environmental exposure.
- Avoid using adhesive pads for critical secondary restraints—mechanical fastening should be the standard.
- Include all access hatches in dropped object prevention programs and maintenance schedules.
- Implement procedural checks to confirm hatch security after maintenance or inspections.
- Regular inspections are essential to identify potential hazards before they result in incidents.
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Source: IMCA
