I tried using the TDC with radar data (no map contacts; OTC mod and 3D TDC and RRU enabled)... my radar data was spot-on, because the target was not zig-zagging and maintained constant speed and course. I input my data into the TDC, and all my fish missed astern. I've had so much success with the Dick O'Kane method that I immediately went back to that instead of using the TDC. However, I've always wanted to figure out where I went wrong with entering the data into the TDC, so i could use the real O'Kane method...
Perhaps another reading of the OTC and 3D TDC/RRU mod instructions is in order, but if anyone has any advice, I'd welcome it.
TG
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