These small, usually crimson, material tags are connected to parts of plane, equivalent to covers, pins, and different security gadgets, that have to be eliminated earlier than the plane is operational. They function a distinguished visible reminder to floor crews and pilots performing pre-flight checks. A typical instance is their use on pitot tube covers, which defend these essential airspeed sensors from particles and bugs whereas the plane is on the bottom.
Their vibrant colour and clear wording contribute considerably to flight security by stopping doubtlessly catastrophic oversights. Traditionally, these tags advanced from less complicated flags or streamers, changing into standardized for improved readability and effectiveness. This standardization performs a significant position in constant communication throughout completely different plane varieties and operational environments, minimizing the chance of human error.