Prohibited Landing Marker: Definition, Standards & Installation Guide

A prohibited landing marker is a high‑visibility sign placed on a surface where aircraft must not land, take‑off or roll. It warns pilots of unsafe terrain, obstacles or restricted zones and must meet GACA colour, size and illumination rules to be legally recognised.

What is a prohibited landing marker?

The marker is a painted or lighted symbol that indicates a no‑landing area. Typical shapes include a large red “X” or a diagonal stripe pattern. It is used on helipads, vertiport pads, taxiways, or any part of an airfield that cannot support aircraft weight. The purpose is to prevent accidental landings that could damage equipment or endanger personnel.

Regulatory requirements in Saudi Arabia

The General Authority of Civil Aviation (GACA) defines the appearance and placement of prohibited landing markers in its Aerodrome Standards Manual. Key points are:

• Colour: Red background with white diagonal stripes or a white “X”.
• Size: Minimum 1 m square for ground‑level pads; larger dimensions for high‑visibility areas.
• Visibility: Must be visible from at least 3 km in daylight and from 2 km at night when equipped with approved lighting.
• Maintenance: Markers must be inspected every 12 months and repainted or replaced if faded. Compliance is mandatory for any commercial or private operation seeking GACA certification.

Design, colours and placement guidelines

Design starts with a site survey. Engineers determine the exact coordinates where the marker will be most effective. The surface must be clean, dry and free of debris before painting. If lighting is required, low‑intensity obstruction lights are installed at the marker corners, powered by a dedicated circuit with a backup battery lasting at least 8 hours. Typical dimensions for a helipad of 20 m diameter are a 1.5 m square marker placed at the centre. For larger runways, markers are positioned at the edge of the unusable zone, spaced no more than 500 m apart.

How Northlane Solutions can help

Northlane Solutions provides end‑to‑end services for prohibited landing markers. Our Heliport Marking Services cover site assessment, surface preparation and application of GACA‑approved paint. For larger airfields we offer Runway Marking Services that include precision layout and quality control. All our work uses Airfield Marking Materials that meet international durability standards, ensuring the marker retains colour and reflectivity for at least five years. We also supply the optional lighting package, install the wiring, and provide a 24‑month maintenance contract that includes annual inspections and touch‑up painting.

Practical steps for procurement and installation

1. Request a site survey – Contact our sales team with the airfield layout. We will schedule a visit within 7 working days.
2. Approve the design – You receive a CAD drawing showing marker size, colour and lighting layout. Changes can be made before the final sign‑off.
3. Place the order – Our procurement team confirms material availability. Lead time for paint and lights is 10‑14 days from order confirmation.
4. Installation – Certified technicians complete the work in 2‑3 days for a typical helipad, longer for runway sections. All work is performed under a temporary safety zone to protect personnel.
5. Final inspection – A GACA‑approved inspector verifies compliance. We provide the inspection report and a certificate of conformity.
6. Ongoing support – Enroll in our maintenance contract for yearly checks. Replacement parts are stocked and can be dispatched within 48 hours.

FAQ

What colours are allowed for a prohibited landing marker in Saudi Arabia?

GACA requires a red background with white diagonal stripes or a white “X”. The paint must be aviation‑grade, UV‑stable and meet the specified reflectivity.

Can a prohibited landing marker be used on a concrete apron?

Yes, as long as the surface is properly prepared and the marker dimensions meet the minimum size. Concrete may need a primer before the red paint is applied.

How often must the marker be inspected?

Inspections are required at least once every 12 months. Any fading, cracking or loss of visibility must be corrected before the next flight operation.

Does Northlane Solutions provide lighting for night‑time visibility?

We supply low‑intensity obstruction lights that meet GACA night‑operation standards. The lights are wired to a backup battery that guarantees at least 8 hours of operation during a power outage.