Which symbol is used on a helipad for marking parking?

The symbol used on a helipad for marking parking is a yellow "H." This designation is specifically chosen because the yellow color provides high visibility against various backgrounds, making it easier for pilots and ground personnel to identify the designated parking area. The "H" indicates that it is a helipad, ensuring that users can quickly recognize the space intended for helicopter operations.

The use of yellow aligns with the standards set by aviation regulations that aim to enhance safety and clarity in airside operations. Additionally, the standardized color coding for helipads helps in distinguishing them from other ground markings that may be present, ensuring that helicopters are parked in designated safe zones.