When a PSV is in Follow Target Mode, what is the best combination of Position Reference Sensors for following a Semi-Submersible?

In Follow Target Mode, a Platform Supply Vessel (PSV) needs to maintain a precise position relative to a semi-submersible, which is generally more stable than other types of platforms but still requires accurate positioning due to its dynamic nature. The optimal combination of position reference sensors plays a crucial role in ensuring that the PSV can accurately follow the target.

Using two DGNSS (Differential Global Navigation Satellite System) receivers provides enhanced redundancy and accuracy in the positioning data, which is important in a marine environment where satellite signals might face interference. The inclusion of at least two Prism reflectors with a Fanbeam radar increases the system's ability to provide precise distance measurements to the semi-submersible. This is particularly valuable because the reflectors help in maintaining consistent tracking, especially under varying conditions that can affect the radar signal.

Therefore, the combination of two DGNSS units and one Fanbeam sensor equipped with at least two Prism reflectors strikes a balance between reliability, accuracy, and the capability to track the position of the semi-submersible effectively. This ensures that the PSV can follow the target with minimal drift, maintaining safe and efficient operation during its tasks.