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AUS-EWK-L2.2

Unattended machinery spaces — alarms, rounds, and being on call

A periodically unattended machinery space — UMS — is not an engine room nobody looks after. It is an engine room whose supervision has been moved: from a pair of eyes at the console to a monitoring system, an alarm extension and a duty engineer who is responsible whether he is in the workshop, in the mess or asleep in his bunk.

Entry & progression

MO72 Schedule 3 cl 3.1 explicitly recognises "service on call in periodically unattended machinery spaces" on vessels ≥750 kW as qualifying sea service. Being on call is watchkeeping. The Marine Order says so.

What makes a space UMS-capable

  • A comprehensive alarm and monitoring system covering machinery, temperatures, pressures, levels, bilges and fire detection
  • Alarm extension to the duty engineer's cabin, the accommodation alleyways and the mess spaces — an alarm that only sounds in an empty engine room is decoration
  • Escalation to the bridge if the duty engineer does not acknowledge within the set time
  • Automatic standby start — standby pumps and generators that cut in on failure without a human hand
  • A dead-man / engineer's safety system for anyone working alone in the space

The duty engineer

You are on watch. You do not leave the vessel. You remain fit — that means rested and unimpaired, for the whole period, not just the parts of it you expect to be woken. You carry the alarm. You know where your torch is.

And you make rounds. UMS does not abolish the round; it schedules it. A cold monitoring system will tell you a bearing has failed. Only a human will tell you it is about to.

Responding to an alarm at 0300

  1. Acknowledge the alarm — this stops the bridge escalation, and starts your clock
  2. Read what it actually says before you move. The panel is telling you where to go
  3. Take a torch and a radio. Tell the bridge you are entering the machinery space
  4. Go and look. Confirm the alarm is real before you act on it
  5. Fix, isolate or stabilise — and if it is beyond you, or the plant is at risk, call the chief engineer. Calling early has never ended a career; calling late has
  6. Log it. The time, the alarm, what you found, what you did

WARNING — Never enter an unattended machinery space alone without telling someone The bridge must know you are going below, and must know when you are out. If your vessel has a dead-man alarm, use it — it is not an insult to your competence, it is the only thing standing between you and lying unconscious behind a generator for four hours.

The most dangerous machinery space on any vessel is the one everybody believes is empty.

Being on call is not being off duty

Crew — and some engineers — treat the UMS night as free time. It is not. The responsibility for the propulsion of the ship sits with you. The fact that AMSA counts it as qualifying sea service should tell you exactly how seriously the Order takes it.

You are asleep in the same sense that a fire crew is asleep. Which is to say: dressed, close, and expecting the bell.

Practice questions

5 questions
recallcore

recall · core

Under MO72 Schedule 3 cl 3.1, service on call in periodically unattended machinery spaces on vessels ≥750 kW is: (a) Explicitly recognised as qualifying sea service (b) Excluded from qualifying sea service (c) Credited at half rate (d) Capped at 20 weeks in all cases

recallcore

recall · core

An alarm extension system in a UMS vessel must reach: (a) The engine control room only (b) The bridge only (c) The duty engineer's cabin, the accommodation and the mess spaces (d) The chief engineer's cabin only

recallcore

recall · core

Acknowledging an alarm at the panel: (a) Clears the fault (b) Stops the escalation to the bridge, and starts your clock (c) Automatically starts the standby machine (d) Records the fault in the oil record book

recallcore

recall · core

UMS operation means: (a) The machinery space is never entered at sea (b) Rounds are abolished in favour of automatic monitoring (c) The engine room is supervised by the bridge watchkeeper (d) Supervision is moved to a monitoring system and a duty engineer — rounds are scheduled, not abolished

recallcore

recall · core

Before entering an unattended machinery space alone at night, you should: (a) Tell the bridge you are going below, and use the dead-man alarm if fitted (b) Wake the chief engineer as a matter of course (c) Nothing — UMS spaces are designed for single entry (d) Wait until a second engineer is available, always

AI-drafted catalogue content pending SME review. Sea service and course requirements change; verify with AMSA before relying on this for a career decision.

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