Prohibited landing flags

The Frictape Prohibited Landing Flag is a helideck closure marker built to the international standard landing prohibited signal specification — a red background measuring 4 meters x 4 meters with a diagonal yellow cross 500 mm wide. The marker is constructed from heavy-duty reinforced vinyl fabric with a UV-stabilised finish and fire-resistant treatment. A welded hem runs the full perimeter, fitted with spur tooth eyelets at five points per side for secure tiedown. Each unit ships complete with tiedown ropes and a storage bag for compact stowage when not in active use. The marker is sized to cover the letter “H” inside the Touchdown/Positioning Marking Circle on the helideck surface, as specified under CAP 437 and ICAO Doc. 9261.

The reinforced vinyl construction resists offshore UV exposure, salt spray, and wind loading across the full 4 x 4 meter face without tearing or color fade. The welded hem and eyelet system holds the marker flat against the deck under operational wind conditions. If the marker sustains minor damage during use or storage, the material is repairable without requiring full replacement of the unit. The storage bag keeps the folded marker protected and immediately accessible to helideck personnel when a sudden closure event requires rapid deployment.

The Frictape Prohibited Landing Flag is deployed on offshore oil and gas platforms, FPSOs, drilling rigs, offshore wind vessels, naval ships, and megayacht helidecks whenever helicopter operations must be temporarily halted. Closure triggers include perforation operations involving explosive charges, equipment unserviceability, weather-related hazards, deck contamination, or any operational condition that makes helicopter landing unsafe. The marker signals closed deck status directly to approaching pilots from the air.

Leader Infra supplies this CAP 437 and ICAO Doc. 9261 compliant prohibited landing marker as a mandatory helideck safety item — ensuring every installation has a certified, immediately deployable deck closure signal available at all times, in full compliance with international offshore helicopter operations standards.

FAQ — Is one prohibited landing flag sufficient per helideck installation? Yes. One prohibited landing marker per helideck is the standard recommendation. However, it must be stored accessibly at all times so helideck personnel can deploy it immediately when a closure decision is made — any delay between the decision to close the deck and the marker being visible to an inbound pilot represents a direct safety risk.