The vehicle commander released the grenades one at a time[1] by wire control which operated a ratchet coupled to a camshaft.
Each pull of the control wire rotated the camshaft one fifth of a turn, releasing a smoke grenade, the pin of which was drawn out by a fixed chain, and the ratchet was returned to its original position by a second spring.
[3] Later examples of the Nebelkerzenabwurfvorrichtung were fully enclosed in an armored box (N.K.A.V.
[4] The Nebelkerzenabwurfvorrichtung was discontinued beginning in April 1942 because it had not proven to be effective,[3] the main disadvantage being that the resulting smoke screen built up behind the vehicle.
[5] It was succeeded by the turret mounted Nebelwurfgerät launcher.