Describe：

R type dock bollard is a type of mooring fixture used in maritime operations to secure vessels to a dock or quay. These bollards are designed to handle the high mooring loads imposed by large ships. The "R-type" classification typically indicates specific design features that make the bollard suitable for certain conditions and vessel types.

Features：

Design and Shape: R-type bollards usually have a robust, rounded design to minimize wear on mooring lines and to handle multi-directional loads. Their shape often resembles a mushroom or a T-top, providing a smooth surface for lines to be looped around.

Material: They are typically made from cast iron, cast steel, ductile iron to withstand the harsh marine environment and the high tension of mooring lines.

Mounting: R-type bollards are securely mounted to the dock or quay structure, usually through a bolted flange or embedded in concrete to ensure stability under load.

Usage: They are used in a variety of maritime settings, including commercial ports, cargo terminals, and shipyards, where reliable mooring is essential for safety and efficiency.

Drawing：