Engineering Watchkeeping, Operations and Machinery Maintenance
Core concepts
Watchkeeping covers handover, rounds, log entries, response to alarms, and the authority of the engineer of the watch. Understand planned maintenance systems, condition monitoring (vibration, oil analysis, thermography), and the discipline of permits to work, isolation, and toolbox talks. Know the requirements for unmanned machinery space operation and the meaning of UMS alarms and dead-man alarms.
Traps in questions
- Handing over without informing the relief of ongoing abnormal conditions or recent changes.
- Leaving the engine room unattended without the required UMS arrangements being active.
- Confusing a permit to work with an isolation certificate; both may be needed.
- Assuming a routine alarm can be silenced and left; it must be investigated and recorded.
Rule of thumb and worked example
Oil analysis trending: if iron rises from 20 ppm to 60 ppm over 500 running hours, the rate is 0.08 ppm per hour. A sudden step change, not just a high value, is the warning. Rule of thumb: investigate any parameter that changes by more than 10% from its established baseline, even if still within limits. Always record the reading, time, and action taken in the log.
Study focus
Revise the engineer of the watch's responsibilities, the meaning of 'not under command', and the correct response to blackout or loss of steering. Know how to conduct a proper round: look, listen, smell, and touch with care. Understand maintenance planning, spare parts control, and the importance of accurate records for survey.