I really do wonder why they ended up in this. It can' be that hard to make even a hacky DIY system to do it automatically. The navigation system just had to have some digital or even analog output, then it would be just the problem of interpreting the signal with some script and writing it into a file.

When Wilby recommended the company use standard software to process ping data and plot the sub’s telemetry automatically, the response was that the company wanted to develop an in-house system, but didn’t have enough time.