Freeing the Jammed Hook at Sea - From Plan to Permit to Stop
VIYADA NAREE
Bulk carrier · Yellow Sea · 20 January 2026
Source: TSIB TIB/MAI/CAS.224
The Situation
You are the Chief Officer of a bulk carrier outbound from a shipyard in January. This scenario takes you through the whole task of freeing a jammed crane swivel hook at sea: the plan, the risk assessment, the permit, the site review and the job. Your earlier choices carry forward. It is a training reconstruction based on the TSIB report.
The Lesson
The controls are a chain: plan with stop conditions, write the weather limit as a number, make the barriers physical, secure the gear before you disconnect it, agree the heading with the bridge, and let anyone stop the job.
Human Element
A schedule-driven job at sea, a weather control that was never defined, barriers that were ticked and not there, stop-work authority held by one person, and a heading option nobody planned. Five linked stages, then a casualty response.
Try the First Decision
PLANNING AND PREPARATION. You are the Chief Officer of a bulk carrier that has just left a shipyard after dry-docking. The No. 2 crane’s swivel hook was found difficult to turn before departure, and now it is jammed. The crane will be needed for cargo loading in a few days. The sea is slight with occasional gentle rolling, and the ship is heading toward a busy traffic separation scheme. How do you plan the job?
This is a preview — the full scenario branches from here based on what you choose, with real consequences and a debrief at the end.
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