They were similar electro-mechanical devices. However, later German models had the edge over the US TDC because, once the speed and course of an enemy force or convoy had been ascertained, the aim-off calculator could be fed data on up to five separate targets within the force; it could hold these, transmitting different gyro angles to different torpedoes, which could then be fired one after the other within seconds at the five different targets. The U-Boats also enjoyed an advantage in the optics department. The German Zeiss 7x50 lookout binoculars used in the UZO were lighter and more waterproof than those in other navies.
The primary American advantages probably lay in having sonar and radar sets for range-finding.
__________________
 
--Mobilis in Mobili--
|