I am not sure if the optics on the TBT were better than the german UZO but I do know that it was built much better that the UZO and did not require disassembly for dive. The germans had to take the UZO down every time they went to dive. The TBT was able to withstand the pressures of the dive. I think it was also capable to transmitting marks and bearing to target to the to the TDC electrically.
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