Shaped, linear explosive charge for use in cutting; standoff spacer for a shaped, linear explosive charge for use in cutting; standoff block for a shaped, linear explosive charge for use in cutting; waterproof standoff spacer for a shaped, linear explosive charge for use in cutting; waterproof standoff block for a shaped, linear explosive charge for use in cutting; water resistant standoff spacer for a shaped, linear explosive charge for use in cutting; water resistant standoff block for a sh...