Helideck lighting must support safe visual cues without distracting or dazzling the pilot. Offshore and industrial installations also need to consider obstruction lighting, emergency power, hazardous-area classification, corrosion and maintenance access.
CAP 437 is a widely referenced source for offshore helicopter landing-area standards. The current CAA publication includes guidance for visual aids and safety-critical equipment, but each project must confirm the aviation authority, operator and local approval basis that applies.
This article explains the main specification questions for helideck perimeter lights and related aviation lighting. It does not replace the project’s approved aviation design or authority review. This helideck lighting guide keeps the selection process focused on documented application requirements.
Helideck lighting: What helideck lighting needs to achieve
Perimeter lights help define the landing area and provide a consistent visual reference during approach and landing. The arrangement, colour, intensity, spacing and control method should follow the applicable aviation specification and be coordinated with the helicopter operator.
Obstruction lights serve a different purpose. They identify structures, elevated equipment and other hazards around the landing area. Do not treat a perimeter fitting and an obstruction light as interchangeable.
- Clear perimeter definition
- Controlled intensity and glare
- Visibility from the required approach directions
- Compatibility with emergency power
- Correct aviation and hazardous-area approvals
CAP 437 and project-specific requirements
The UK Civil Aviation Authority’s CAP 437 publication is used internationally as a reference for offshore helideck design. It addresses visual aids and includes requirements related to obstruction lighting and emergency power arrangements.
Your project may also reference local civil-aviation requirements, operator procedures, class rules, marine standards or client specifications. Confirm the hierarchy before ordering fixtures.
Hazardous-area and offshore considerations
If the helideck sits within or close to a classified area, the lighting equipment may also need ATEX or IECEx approval. The fixture must be suitable for the zone, gas or dust group, ambient temperature, salt exposure and maintenance method.
Marine-grade construction, sealed cable entries, corrosion-resistant hardware and a realistic inspection plan help keep the system reliable after installation. Include the emergency supply and failure-reporting arrangement in the design review.
Daly’s helideck resources
Daly’s helideck and aviation obstruction lighting guide covers the main fixture families. Review the helideck and obstruction-lighting range before sending your layout and applicable standard.
For a project recommendation, use the Daly Middle East contact page and include the helideck drawing, zone classification and required aviation authority reference.
Frequently asked questions
Are perimeter lights the same as obstruction lights?
No. Perimeter lights define the landing area, while obstruction lights mark structures or hazards. They have different functions and may have different requirements.
Does CAP 437 apply to every helideck?
CAP 437 is a widely used reference, but the project must confirm the applicable authority, operator and approval basis.
Do helideck lights need ATEX certification?
They may, if installed in or near a classified hazardous area. Confirm the zone and the required certification with the responsible engineer.
Further reading
Need help choosing the right equipment for your project? Contact Daly Middle East with your application details, required certification and delivery location.