General technical information
Website content describes typical marine survey and diagnostic applications. It is not engineering advice for a specific vessel and must not be treated as a substitute for an agreed scope, onboard risk assessment, competent professional judgment or review of the governing statutory, class, flag, contractual and manufacturer requirements.
Standards and applicability
Standards, codes and guidance can change and may apply differently according to vessel type, size, construction date, flag, class, contract, operating area and project purpose. References on this website are introductory. The applicable edition, clauses, acceptance criteria and authority must be confirmed for each project.
Measurement limitations
Results depend on instrument condition and calibration, measurement position, duration, background conditions, vessel loading, machinery combinations, speed, weather, sea state, access and other recorded limitations. A measurement taken under one condition may not represent every operating condition.
Diagnostics and recommendations
Noise, vibration, machinery and environmental symptoms can have several interacting causes. Preliminary observations or website examples do not establish root cause. Diagnostic conclusions require sufficient project evidence, and recommendations may require design review, specialist calculations, trial changes or verification measurements.
Reports and third-party acceptance
Reports may be prepared to support owners, managers, yards, consultants or submissions. Final acceptance, certification, approval or regulatory interpretation remains with the relevant authorised party, which may include a flag administration, classification society, port, client, shipyard, regulator or contract representative.
Confirm the project scope
Before acting on website information, provide the vessel particulars, location, schedule, symptoms, operating condition, governing requirement and required deliverable. Vessel Doctor will review whether the requested service is appropriate and identify important limitations before attendance.