This document specifies the cone shape features, tank shape features, spherical shape features, "×" and "ten" top mark features displayed on water navigation aids in China sea area, as well as column buoys, rod buoys and joints. The shape requirements of the top sign of the type lamp post. This document is applicable to all buoys (excluding lightships, large navigation buoys, and ice age buoys) and fixed marks in the water in the sea area of China, its ports, and estuaries connected to the sea.
GB 16161-2021 Referenced Document
GB 17381 Regulation for surface colours of the visual aids to navigation