Entry & progression
The service that gets you to Chief Engineer-Limited is five years in an engineroom (11.518(a)). This is what those five years are supposed to teach you.
The three kinds of maintenance
| Kind | Trigger | What it costs you |
|---|---|---|
| Planned / calendar | Hours run, or elapsed time | Predictable. Budgeted. Boring. |
| Condition-based | A measurement crossed a threshold | Requires you to be measuring — and to be honest about the number. |
| Breakdown | The machine stopped | Everything. Usually at 0300, usually with guests aboard. |
A well-run department lives in the first two columns. The third column is not a strategy. It is what happens when you do not have one.
The planned maintenance system
A PMS is a list of jobs with intervals attached. Its value is not the software. Its value is that it converts one chief engineer's memory into an institutional record that survives a crew change.
- Close jobs honestly. A PMS full of jobs marked complete that were not done is worse than no PMS at all, because it manufactures false confidence in everyone who reads it.
- Record what you found, not only what you did. "Replaced impeller" is a task. "Replaced impeller — three vanes eroded, housing scored, suspect debris ingress" is engineering.
- Watch the interval, not just the job. If a job keeps coming back before its interval, either the interval is wrong or the real problem is upstream of the part you keep replacing.
- Keep the spares list honest. A job that cannot be done for want of a part is a deferral pretending to be a schedule.
Deferral — how it actually happens
Nobody decides to run machinery to destruction. What happens is a sequence, and it looks entirely reasonable at every single step:
- The job is due. The boat is on charter. It can wait two weeks.
- Two weeks later the part is not aboard. It can wait until the yard period.
- The yard period is compressed and the job is not on the critical path. It slips.
- The next season starts. The job is now nine months overdue and nobody remembers why.
- The machine fails — at load, at night, somewhere with no support.
WARNING — Deferral is a decision. Make it like one. Deferring maintenance is sometimes the right call. Doing it by drift is never the right call. If you defer, write down what you deferred, why, what the risk is, and the date by which it must be done. Tell the chief. Get it in the log. A documented deferral is engineering judgement. An undocumented one is negligence with a story attached.
Critical spares
Not all spares are equal. The ones that matter are the ones where the consequence of absence is a dead ship: injectors, fuel pumps, cooling-water pumps, starting-air compressor parts, steering gear components, the emergency generator's batteries. Know which of your spares are single-point-of-failure spares. Never let those run to zero because a cheaper filter cartridge happened to be on the same order.
The handover file
You will one day leave a boat, and somebody will inherit your plant. What you leave behind — an honest PMS, an accurate defect list, a spares inventory that matches what is actually on the shelf, and the written history of what you found when you opened things up — is a fair measure of whether you were a good engineer or merely a lucky one.