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Simulated workplace
Scenario · Marine Engineering and Maintenance

Diagnose and manage a main engine cooling defect

You are the Marine Engine Driver on Bluewater Osprey.

Intermediate3 to 4 hours8 tasks
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The situation

What has happened

During a berthing assist on 9 September the port main engine on Bluewater Osprey rose to 98 degrees under load and was shut down. The tug finished the job on the starboard engine and the Marine Operations Manager has restricted her to single engine harbour work. Marco Vitale noticed low raw water flow at the overboard discharge. The engine has 6,200 hours since overhaul. The tug's survey is due on 20 November and the port has a busy fortnight of ship movements ahead. Soraya Petrakis needs a proper diagnosis, the defect managed through the planned maintenance system and a recommendation on whether Osprey can continue restricted or must come off the run.

Your brief. Work through the raw water and jacket water cooling systems on the port main engine to find the cause of the overheating, carry out the permitted servicing with isolation and records, update the defect in the Planned Maintenance and Defects system, and recommend to the Fleet Engineering Manager whether the vessel can continue in restricted service.
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Tasks

Deliverables

  • Diagnosis and inspection record
  • Updated defect record in the Planned Maintenance and Defects system
  • Engine test run log
  • Written recommendation to the Fleet Engineering Manager

Documents to use

Systems to use

Planned Maintenance and Defects

Schedules maintenance tasks by running hours and date for every vessel and tracks reported defects from report to closure.

Fleet and Vessel Register

Holds each vessel's particulars, certificate and survey status, operating limits and current availability.

For trainers and assessors

Units of competency

Current on training.gov.au for the Maritime Training Package as at 10 September 2026.

MARB028Service marine internal combustion engines and propulsion and auxiliary systems
MARB042Manage reported defects, damage, repairs and maintenance of a vessel
MARB036Implement vessel planned maintenance system
MARC053Operate marine internal combustion engines and associated systems up to 1500 kW
MARF029Meet work health and safety requirements

Qualifications

MAR30824Certificate III in Maritime Operations (Marine Engine Driver Grade 2 Near Coastal)
MAR40224Certificate IV in Maritime Operations (Marine Engine Driver Grade 1 Near Coastal)
Assessor notes

What to look for

Evidence guide

Look for a logical fault-finding sequence through the raw water system before the jacket water system, isolation and lock-out applied before opening anything, findings recorded for each component, and test results compared with the manufacturer's limits. The recommendation must be justified by the evidence and must not return the vessel to full service on hope.

The student's evidence summary lists every record they created or changed in the systems named above, their notes and the tasks they ticked. Verify it against the deliverables and your own assessment tool.