Paul,
Me too on the metric/imperial system use...from school to all the years in engineering. I got used to most conversions also, but those lbf/ozf to those pesky newtons or Vs/Versa and the torque conversions had to be put on paper and cross checked for me to be sure. And who in the heck came up the the magical kilopond (land of 1000 ponds (pondus-weight) and did they kill newton by the meter, 75 years later? ;-) Thank goodness for the converters built in or could be programed into the TI's, Hp's & spreadsheets and sure you had big computers and diligent programming...now we have apps for that. ;-) Some how it doesn't seem so important anymore and the old Stealers Wheel song; Stuck in the middle...comes to mind here. The dichotomy it has created is a bit ironic, but it is what it is...perhaps it makes us more versatile.
Didn't work with metric materials much other than fasteners and most of the machines were imperial as well as machinists. Only systems or components for out of country use would be converted if necessary, and I designed and built the drill machines to build either...thank goodness arcsec and quadrature counts are pretty straight forward.
I can see that at 10k feet, earballing that to 3k meters would be substantial let alone minuscule differential sound velocities or noise at that depth...quite a small margin for error and would definitely be a bad day on goat rock.You just got use to it and didn't make mistakes or you could be off by a factor of 3+ (a bad day indeed).
Hi-Regards, PJ![]()

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