Being 0.01 over the legal limit is a violation, but being 0.001 over may not net you a ticket depending on the device doing the measurement.
If the device can only display 2 digits right of the decimal place, and internally it calculates your BAL is 0.081, the display is only going to read 0.08.
Since USBC arrives at the differential by measuring the 3 different RG values, you have to look to the accuracy of the device doing the measurement.
The device shown in the Ball Approval Process video includes 2 digit to the right of the decimal.
Since they average over 11 rotations, they can get a 3rd digit.
Remember, when it displays XXX.35, the real more accurate value not displayed could be anywhere between XXX.3450 and XXX.3549
Your output of a calculation can never be more accurate than the input the calculation uses.
It looks like USBC may be trying to squeak more accuracy out of a calculation than it has accuracy going in.
Bookmarks