Abstract: For the indirect laying or aiming of a weapon at a target, which weapon is arranged upon a vehicle, there are performed with the aid of an electronic computer predetermined steps which enable the weapon to be layed rapidly, simply and in a fail-safe manner. The weapon is initially oriented with respect to the north direction. The target azimuth is stored in the computer. The computer shows the momentary direction deviation and the weapon is pivoted for such length of time until the display shows "O".

Abstract: In order to eliminate or suppress external weather effects from acting upon the objective lens system or arrangement of an aiming periscope installed at an armed combat vehicle, a part which protrudes out of the combat compartment or space of the vehicle is surrounded by a protective globe or hood. Between the protective globe or hood and the protruding part there are provided air channels, by means of which there can be conveyed an air current past the objective lens system towards the outside. Advantageously, the excess pressure emanating from the combat compartment is employed for generating the air current or flow. Apart from the weather protection which is thus provided for the objective lens system there also is afforded a temperature compensation within the aiming periscope.