OWS controls supervise the installed machinery-bilge treatment arrangement. Separator operation, representative monitoring and discharge stopping are connected functions but require distinct checks.
Seanav Marine provides independent service assessment. Send the equipment identity, symptoms and attendance window so the required capability, parts and any manufacturer involvement can be confirmed.
What should the service assessment check?
The following items define a starting scope for a competent service assessment. The actual test method and acceptance criteria must come from the installed equipment documentation and the agreed job scope.
- Separator status and level probes.
- Pump and recirculation sequence.
- Bilge alarm sample path.
- Automatic stopping and fault behavior.
What must be distinguished before testing?
Operating an OWS does not automatically permit discharge. MARPOL conditions, the approved piping arrangement and local restrictions still apply.
Can an OWS control fault be separated from poor separation performance?
First distinguish a control-sequence failure from an oil-content alarm during operation. Record separator status, sample-system conditions and the alarm history. The monitor and protective outputs require their own assessment; changing alarm settings does not establish treatment performance.
Details that help assess this equipment
- Separator and bilge-alarm model.
- Process state when the alarm occurred.
- Sample flow, records and protective-output status.
Equipment references and their scope
- AMSA: oil-filtering equipment testing — Inspection of applicable oil-filtering, bilge-alarm and stopping arrangements.
- DECKMA Hamburg: bilge-alarm service guidance — Bilge-alarm maintenance, exchange and manufacturer calibration boundaries.
These references explain equipment or system examples. They do not establish the fitted configuration, SEANAV manufacturer authorization or a vessel’s acceptance limits. Use the installed model’s documentation for the actual work.
Related equipment guidance: 15 PPM Bilge Alarm Systems · 15 PPM Bilge Alarm Calibration and OWS Service: What to Check · Marine Pollution Control Automation
How service is planned
Agree the affected machinery, safe isolation, operational restrictions and equipment-specific test plan with the vessel. Preserve as-found settings and available configuration backups. Confirm proposed changes and compatible replacements before work.
Record the completed work, functional-test results, outstanding defects and operating limits. Changes affecting approved functions need the appropriate maker, owner or approval-body review.
Maintenance, survey and documentation
Maintenance intervals and calibration methods depend on the manufacturer’s instructions, service conditions and vessel PMS. There is no blanket annual calibration or five-year overhaul rule for every automation component. Statutory and Class survey requirements must be established for the particular vessel and equipment.
A service report records the work performed and observed results. It does not by itself issue or renew a ship’s statutory certificate. Manufacturer authorization, specialist calibration and survey witnessing must be confirmed where required; Seanav Marine’s independent service role does not imply direct OEM agency or universal Class approval.
Request oily water separator controls support
Send the vessel name and IMO number, port, ETA/ETD, equipment maker and model, fault description, alarm screenshots and relevant drawings or logs. State whether the request involves routine maintenance, a defect, replacement, retrofit or an upcoming survey. Attendance depends on access, engineer availability, parts and the confirmed scope.
service@seanav.org · +971 58 568 1197 · Contact the operations desk
Reference framework
These sources explain the relevant system or regulatory context. They do not replace the installed equipment manual or prove the applicability of a particular rule to every vessel.
- IMO: SOLAS convention and chapter scope
- IACS: UR E22 computer-based systems
- AMSA: MEPC.107(49) alarm, stopping and sample-path checks
- Lloyd’s Register: bilge-alarm calibration requirements
About this guide
Published by Seanav Marine. Editorial and source review: , AI-assisted. This general service guide is based on the references shown; it is not a signed vessel-specific engineering procedure. Equipment manuals and the responsible technical personnel determine the job requirements.
For technical assessment or a factual correction, contact Seanav Marine with the equipment identity and supporting documents.