This study shows the influence of RDX, Al and AP on the performance and reaction behavior of underwater explosives. The studied explosives varied in formulation, aluminium particle size and aluminium arrangement in the matrix. The different explosives were characterized by analyses of the: detonation products after blasting in a closed vessel. The performance was measured by underwater explosions of charges with weights of 70 g, 250 g, 500 g and 1000 g.