A projectile being attached to the wires of the manually operated crane jib.
Close-up shot of the rocket launcher, clearly showing the many blast vents around the muzzle ring.
"A prototype was first completed in October 1943, and the Sturmtiger was to eliminate house-to-house combat using firepower to flatten all buildings or bunkers with enemy soldiers. Heavily armored and equipped with a rocket projector to launch naval depth charges, the Sturmtiger would have been an awe-inspiring weapon capable of dominating any urban battlefield.
Unfortunately for Germany, production did not begin until August 1944, when city sieges had long ceased to be a priority of the Wehrmacht. Instead, the Sturmtiger were thrown into desperate defensive field operations in Germany and Italy where their massive armament was of limited advantage, though no vehicle could afford to be struck by a Sturmtiger's depth charge (which after all was designed for use against submarines). Eventually most were disabled in combat or left behind when petroleum was ran out. Only 18 Sturmtiger were produced, by converting"
Panzermörser Sturmtiger