1. An arming device for a submersible explosive weapon comprising in combination, a housing, an explosive in said housing, an electrically ignitable detonator for said explosive, spring motor means rotatively moving said detonator in said housing from a first position in which the detonator cannot fire the explosive charge toward a second position in which the deTonator can fire the explosive charge, a locking mechanism preventing movement of said detonator toward said second position comprising a latch in said housing releasably engaging said rotatable detonator to prevent rotation thereof, a movable piston comprising a releasing device responsive to a predetermined pressure of a medium surrounding said housing to release said locking mechanism, a brake controlling the rotation speed of said motor means including a set of electrical contacts stationary in said housing, and a program disc with an electric circuit thereon relatively rotated by said motor with said detonator to actuate said contacts, said electric circuit and said contacts presenting patterns for short circuiting the detonator for preventing ignition for a predetermined arc of rotation of said detonator, and for electrically activating said detonator after a further predetermined arc of rotation of said detonator wherein said detonator has a plurality of latch elements engageable with said latch in said housing at different angularly displaced positions of rotation of said detonator.

3. An arming device for a submersible explosive weapon comprising in combination, a housing, an explosive in said housing, an electrically ignitable detonator for said explosive, spring motor means rotatively moving said detonator in said housing from a first position in which the detonator cannot fire the explosive charge toward a second position in which the detonator can fire the explosive charge, a locking mechanism preventing movement of said detonator toward said second position comprising a latch in said housing releasably engaging said rotatable detonator to prevent rotation thereof, a movable piston comprising a releasing device responsive to a predetermined pressure of a medium surrounding said housing to release said locking mechanism, and a viscous brake controlling the rotation speed of said motor means wherein said viscous brake comprises closely spaced friction surfaces respectively located on said detonator and said housing with the spaces between said surfaces filled with silicon oil of high viscosity.