Onboard compliance measurement
Low location light measurements for passenger vessel safety
MariTeam performs onboard luminance measurements of photoluminescent low location lighting systems and provides clear documentation of the measured condition.
Different systems, different preparation
Photoluminescent and electrically powered LLL
Low location lighting may store energy from the vessel's normal lighting or use a dedicated electrical supply. The survey must take the installed technology into account.
Photoluminescent systems
Photoluminescent strips and markings absorb energy from ambient lighting and release it as visible afterglow in darkness. Measurement requires controlled charging and dark adaptation periods before readings are taken.
Electrically powered systems
Electrical LLL may use LEDs, electroluminescent strips or other powered light sources. Its operation, supply and light output are assessed using a procedure appropriate to the installed system.
Why measurement matters
Visibility when normal lighting is unavailable
Low location lighting helps passengers and crew identify escape routes when smoke or loss of normal lighting makes conventional signs and lighting difficult to see.
IMO Resolution A.752(18) sets out evaluation, testing and maintenance guidance for low location lighting systems. Regular inspection and periodic luminance measurement help identify deterioration, damage or areas that no longer provide the required performance.
Routine visual checks
The onboard maintenance routine should include visual inspection and functional checking, with defects recorded and corrected.
Periodic luminance testing
The luminance of the low location lighting system should be measured at intervals not exceeding five years.
Measurements under controlled conditions
Readings are taken onboard after the system has been prepared in accordance with the applicable measurement procedure.
The MariTeam service
From planning to a documented measurement report
We coordinate the survey around the vessel’s location and operating schedule and keep the process clear for the superintendent, crew and attending parties.
Survey preparation
We review the vessel details, system information, available drawings and previous measurement records before attendance.
Onboard attendance
A technician attends the vessel and carries out measurements at representative locations throughout the relevant escape routes.
Result assessment
The readings are recorded and assessed so that deficient areas and the overall measured condition can be identified.
Reporting and follow up
You receive organised documentation of the results together with clear identification of any areas requiring attention.
Practical documentation
A result you can use onboard
The purpose is not simply to collect readings. The report should give the vessel and shore organisation a practical overview of the measured system condition and support the next maintenance decision.
Vessel and system identification
Clear reference to the vessel, survey date and measured LLL system.
Recorded measurement locations
Structured presentation of the positions and associated luminance readings.
Observed deficiencies
Identification of relevant damage, missing material or areas requiring further attention.
Basis for follow up
A clear record to support maintenance planning, corrective work and subsequent verification.
Attendance where the vessel is
International service coordination
MariTeam coordinates low location light measurements according to vessel location, port access and the available service window. Early information about the itinerary makes it easier to identify the most practical attendance option.
Where corrective work or replacement material is required, we can also help define the next step and coordinate suitable photoluminescent products.
What to include in your request
For a faster quotation, please send:
- Vessel name and IMO number
- Vessel type, flag and class
- Preferred port and attendance window
- Available LLL drawings or system details
- Previous measurement report, if available
Frequently asked questions
Before arranging an LLL measurement
How often should an LLL system be measured?
IMO Resolution A.752(18) states that luminance should be measured at intervals not exceeding five years. Additional testing may be relevant following extensive repairs, alterations or unsatisfactory results.
Can the measurement be performed while the vessel is in service?
This depends on the vessel, access, ambient lighting conditions and the available service window. We assess the practical requirements when planning the attendance.
What happens if areas do not meet the required performance?
The results identify where follow up is needed. The appropriate action may include additional readings, repair, replacement of deficient material or subsequent verification.
Can MariTeam also supply replacement LLL material?
Yes. MariTeam supplies standard and project specific photoluminescent signs, markings and low location lighting products.
Plan your next LLL measurement
Send us the vessel details, port and preferred attendance window for a practical quotation.