It has been organized the diving on the French submarine Fresnel sunk in 2015 in the First World War near the coast of Ulcinj at the beginning of July 2024. This submarine was found by local fishermen while hunting with fishing nets and the discovery was reported to the competent state bodies. This submarine is buried in the sand drifts at the bottom of the sea for over a hundred years and its position and shape were finally discovered, video and photographed by RCUD divers on August 1st, 2020 and it is continued its further search every year.