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Commissioning, Sea Trials & Redelivery
Project Manager control of system commissioning, functional testing, sea trials, defect resolution, documentation and final yacht redelivery after refit.
OVERVIEW
Commissioning and redelivery are the stages where completed refit work is demonstrated to function correctly, safely and in accordance with the agreed technical requirements.
Physical completion of an installation does not necessarily mean that the work package is complete. Systems may require inspection, flushing, pressure testing, electrical testing, calibration, functional testing, alarm verification, load testing, Class or Flag attendance, harbour trials or sea trials before they can be accepted.
The Project Manager should coordinate these activities so that systems are tested in a logical sequence, defects are recorded and resolved, supporting documentation is obtained, and the yacht is not redelivered with important technical or documentary obligations unresolved.
The objective of this module is to provide a structured approach to commissioning, sea trials, defect close-out and final project handover.
KEY RESPONSIBILITIES
• Establish commissioning requirements for each affected system.
• Confirm applicable specifications, drawings and acceptance criteria.
• Identify required inspections, tests and witnessing requirements.
• Coordinate commissioning activities with the Captain, Chief Engineer, crew, yard and subcontractors.
• Confirm that systems are mechanically and electrically ready before testing begins.
• Verify that temporary installations, isolations and protections are controlled.
• Confirm fluids, lubrication, cooling, electrical supply and other prerequisites before equipment start-up.
• Ensure test equipment is suitable and calibrated where required.
• Record commissioning results and outstanding defects.
• Prevent incomplete systems from being accepted solely because they appear operational.
• Coordinate Class, Flag, surveyor or specialist attendance where required.
• Develop a structured sea-trial programme.
• Define trial objectives and acceptance criteria before departure.
• Coordinate personnel and specialist attendance for sea trials.
• Record defects and observations during trials.
• Assign responsibility and target dates for post-trial corrective work.
• Verify repairs and repeat tests where necessary.
• Maintain a final punch list and outstanding-work register.
• Confirm commissioning and test documentation has been received.
• Collect manuals, certificates, warranties and service reports.
• Record approved modifications and final drawing revisions.
• Confirm outstanding commercial and technical items are visible at handover.
• Prepare a structured project redelivery record.
• Maintain traceable evidence of the condition and status of the yacht at project completion.
COMMISSIONING & REDELIVERY CONTROL CHECK
The Project Manager should maintain visibility of the following:
• system or equipment reference
• responsible subcontractor
• applicable drawing or specification
• commissioning procedure
• acceptance criteria
• prerequisites for testing
• system cleanliness and flushing requirements
• pressure or leak testing
• electrical testing
• insulation resistance testing where applicable
• calibration requirements
• alarm and safety interlock testing
• emergency operating modes
• load testing
• functional testing
• harbour testing
• sea-trial requirements
• Class, Flag or survey attendance where applicable
• test results
• defects identified
• corrective actions
• retesting requirements
• final acceptance status
• test certificates and records
• manuals and operating information
• warranty documentation
• final drawings and revisions
• outstanding punch-list items
• handover status
COMMISSIONING SEQUENCE
Commissioning should normally follow a controlled sequence rather than attempting full system operation immediately after installation.
Depending on the equipment, this may include:
• visual and installation inspection
• confirmation of mechanical completion
• confirmation of electrical completion
• removal of temporary protection where appropriate
• flushing and cleanliness verification
• filling and venting
• pressure or leak testing
• electrical and control-system checks
• sensor and feedback verification
• alarm and interlock testing
• controlled initial start-up
• no-load testing
• operational or load testing
• final functional test
• recording and acceptance of results
SEA TRIAL PLANNING
Sea trials should be planned as a controlled project activity and not simply as a final voyage before redelivery.
The Project Manager should establish which systems require demonstration, what operating conditions are required, who needs to attend, what data must be recorded and what constitutes an acceptable result.
The sea-trial plan may include:
• propulsion performance
• steering systems
• stabilisers
• generators and load sharing
• electrical distribution
• alarms and monitoring
• navigation equipment
• communications equipment
• hydraulic equipment
• deck machinery
• vibration observations
• temperatures and pressures
• fuel, cooling and lubrication systems
• manoeuvring
• emergency or backup functions where appropriate
• equipment specifically affected by the refit
DEFECTS IDENTIFIED DURING TRIALS
Defects discovered during commissioning or sea trials should be recorded immediately with sufficient information to identify the equipment, operating condition, observed problem and responsible party.
The Project Manager should determine whether the defect requires immediate correction, further investigation, specialist attendance, repeat testing or formal acceptance of an agreed outstanding item.
Where corrective work could affect another previously tested system, the PM should consider whether additional inspection or recommissioning is required.
REDELIVERY & HANDOVER
Redelivery should represent a controlled transfer from the refit project back into normal yacht operation.
Before final project close-out, the Project Manager should establish a clear status for outstanding technical work, punch-list items, warranties, commissioning records, certificates, manuals, drawings, spare parts and commercial matters.
Any item that remains open at redelivery should be clearly identified together with the responsible party, agreed action, target date and method of final close-out.
A well-controlled handover provides the Captain, crew, owner and management team with a traceable record of what was completed, how it was tested, what documentation was received and what obligations remain after the yacht leaves the yard.
PROJECT MANAGER COMPETENCY TEST
Scenario 1 — Equipment Ready for Start-Up?
A newly installed hydraulic system is mechanically complete and the subcontractor wants to start it immediately. However, the Project Manager has not yet received confirmation that the pipework has been flushed to the required cleanliness level or that all temporary installation debris has been removed.
Question:
What should the Project Manager do?
A. Allow the system to start because the installation is physically complete
B. Run the system briefly and inspect the oil afterwards
C. Confirm the required cleanliness, flushing and commissioning prerequisites before authorising start-up
D. Start the system at maximum pressure to identify any problems quickly
Reveal answer & rationale
Correct answer: C
Why:
Mechanical completion does not automatically mean that a system is ready for operation. Contamination can damage pumps, valves, actuators and other hydraulic components. Commissioning prerequisites should be verified before controlled start-up.
Scenario 2 — Sea Trial Without Defined Acceptance Criteria
The yacht is ready for sea trials after major propulsion and steering work. Several subcontractors are onboard, but no written trial programme or agreed acceptance criteria have been prepared.
Question:
What should the Project Manager do?
A. Proceed and ask each subcontractor to test whatever they consider necessary
B. Establish the trial objectives, test sequence, operating conditions, responsibilities and acceptance criteria before departure
C. Allow the Captain to decide the tests during the voyage
D. Complete the trials and define acceptance criteria afterwards
Reveal answer & rationale
Correct answer: B
Why:
A sea trial should be a planned verification activity. Defined objectives and acceptance criteria allow results to be measured consistently and ensure that the correct systems, personnel and operating conditions are available during the trial.
Scenario 3 — Defect Found During Sea Trial
During sea trials, an intermittent steering alarm appears under a particular operating condition. The alarm clears when the system is reset and does not immediately reappear.
Question:
How should the Project Manager treat the issue?
A. Ignore it because the alarm cleared itself
B. Record the operating condition and alarm, investigate the cause and determine whether corrective action and repeat testing are required
C. Delete the alarm history before redelivery
D. Accept the system because steering operation continued
Reveal answer & rationale
Correct answer: B
Why:
Intermittent faults can be difficult to reproduce after the trial. The operating condition, alarm information and circumstances should therefore be recorded while the evidence is available. The issue should be investigated and appropriately verified before final acceptance.
Scenario 4 — Yacht Ready to Leave the Yard
The principal refit work is complete and the yacht is scheduled to leave the yard the following morning. Several minor punch-list items remain open, two warranty documents are outstanding and one subcontractor still needs to issue a final commissioning report.
Question:
Does every item necessarily have to be physically closed before the yacht can be redelivered?
A. Yes. A yacht can never leave the yard with any outstanding item
B. No. Outstanding items may remain provided their technical significance is assessed, they are clearly documented, responsibility is assigned and an agreed close-out process is established
C. No. All remaining items can simply be removed from the project records
D. Yes, except documentation, which is never part of project completion
Reveal answer & rationale
Correct answer: B
Why:
Redelivery does not always require every minor item to be physically completed before departure. However, unresolved work must be visible and controlled. Its technical significance, responsible party, target date and method of close-out should be clearly recorded and agreed.
MODULE COMPLETION
Before completing this module, the Project Manager should be able to:
• Establish commissioning requirements for each affected system
• Confirm applicable drawings, specifications and acceptance criteria
• Identify inspection, testing and witnessing requirements
• Confirm systems are mechanically and electrically ready before start-up
• Verify flushing, cleanliness, filling, venting and other commissioning prerequisites
• Coordinate functional testing, alarm checks, interlocks and emergency modes
• Confirm test equipment is suitable and calibrated where required
• Record commissioning results and outstanding defects
• Coordinate Class, Flag, surveyor or specialist attendance where required
• Develop a structured sea-trial programme
• Define sea-trial objectives and acceptance criteria before departure
• Coordinate personnel and specialist attendance during trials
• Record defects and observations under the relevant operating conditions
• Assign responsibility and target dates for corrective actions
• Determine when repeat testing or recommissioning is required
• Maintain a final punch list and outstanding-work register
• Verify commissioning records, certificates, manuals and warranties
• Confirm final drawings and approved revisions are available
• Record all outstanding technical and commercial items at handover
• Prepare a structured and traceable project redelivery record
• Ensure any item remaining open after redelivery has a responsible party, target date and agreed close-out method