I just avoid qt altogether.

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You use your starting point as a baseline and keep track of the movement of the craft.

Nobody said GPS (except for you). Location data does not mean GPS.

Depth, pressure, location, etc.

Yeah, but 512 GB? That’s gotta be overwriting some data. The amount of data generated by sensors is massive.

Spared no expense…

All the computers living under the stairs are running some server function. 🤷‍♂️

Buy e-waste? I have people give it to me for free. Offer to recycle it for them.