Navigation-light controls select and monitor the fitted vessel lights and associated supply circuits. The correct configuration depends on vessel characteristics and operation. Navigation lights and shapes under COLREGs must be distinguished from emergency escape lighting and other deck illumination.
Can lamp monitoring confirm the displayed light group is correct?
Lamp-current feedback and the selected navigation-light combination serve different purposes. Compare the channel allocation and actual fixtures with the approved arrangement. An electrically healthy channel can still be assigned to the wrong displayed position.
Details that help assess this equipment
- Channel-to-light allocation.
- Selected group and actual lights.
- Lamp technology and controller type.
Equipment references and their scope
- Lopolight: navigation-light control manual — Navigation-light channel configuration and operator control.
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: Navigation Light Control Panels
Information and checks needed
- Compare the selected lights, circuit identification and indications with the vessel’s approved light arrangement.
- Check the fitted supply changeover, protection and failure indications under the controller maker’s procedure.
- Confirm lamp or LED compatibility, electrical loading and the way the controller detects a failed light.
- Inspect cabling, connections and fittings for faults, then confirm the actual emitted light and operator indication where included in the agreed scope.
Important limits
A controller indication is not proof that the fitting has the correct colour, visibility, positioning or light distribution. Use the applicable COLREG requirements, equipment approval and vessel arrangement. Do not apply one universal lamp wattage or switching time.
Planning the service
Seanav Marine provides independent technical service support. Share the vessel and equipment details so the desk can confirm capability, the proposed scope, required parts, access and any manufacturer involvement. Review the reported symptoms and available records before deciding whether a field device, interface, supply or controller requires repair.
Agree isolation, operational restrictions and testing with the vessel before attendance. Preserve available configuration records and document any proposed wiring, software or parameter changes. Settings and acceptance criteria must follow the installed equipment documents rather than a generic service checklist.
Documentation and approval
The service record should identify the equipment, work performed, test method, results and unresolved defects. Routine maintenance, manufacturer-authorized work and statutory survey are different scopes. A service report does not issue or renew the ship’s statutory certificates, and no direct OEM agency is implied.
Changes affecting approved navigation, steering or emergency functions may need the appropriate manufacturer, owner, flag or recognized organization review. Confirm that requirement before modifying the installation. Maintenance intervals and test methods depend on the equipment and the vessel’s applicable requirements.
Request support
Send the vessel name and IMO number, equipment identification, port and ETA/ETD, fault description, alarm screenshots and relevant drawings or logs. Include any survey deadline. Attendance, parts and the service scope are subject to confirmation.
service@seanav.org · +971 58 568 1197 · Request an assessment
Primary references
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.