p. 269 - 274 CONSIDERATIONS THEORIQUES SUR LA FORME DE L'OMBILICAL ET SUR LES MOVEMENTS D'UN VEHICULE SOUS-MARIN TELECOMMANDE SOUS L'INFLUENCE DE COURANTS MARINS D. Dinu Institut Roumain de Recherches Marines Constanta Abstract The Underwater Remote Controlled Vehicle, surface linked by means of a umbilical cable, acts under marine current influence which represents the main perturbation force of its movement. In the present paper is made a shape analysis which gets the cable and aso of vehicle movement in the time period of a inspection mission at vertical underwater struc- tures. The mathematical approach is aimed to obtain design elements regarding force, direction and time necessary to movement correction with the help of the vehicle propulsion unit.