p. 263 - 268 ETUDE EN VUE D'OPTIMALISER L'INSTALATION DE PROPULSION AVEC JET REACTIF AUX APPAREILS SOUS-MARINS F. Petrea 1), D. Dinu 2) 1) Universite Galati 2) Institut Roumain de Recherches Marines Constanta Abstract In order to use the reactive jet for populations and maneuvering of an underwater remote controlled vehicle, there were analysed the elements which determine the circuit hydraulic efficiency. The theoretical study was used to choose the pump, pipes and ducts design parameters so as obtain the maximum propulsive efficiency.