What is function of Mast riser on oil tanker?

The mast riser on an oil tanker serves as a structural support for various equipment, including antennas and navigation lights. It elevates these components above the main deck to ensure they function effectively without interference from the ship's superstructure. Additionally, it aids in improving visibility for navigation and communication while at sea. Overall, the mast riser enhances the operational safety and efficiency of the tanker.