1, the correction value is for more than three decimal places, and no correction is needed if it is not exceeded.

What is the third number that exceeds? Look it up in the table and add it up to get the complete value.

2. The specific value of the latter correction value is based on integer two, not just √0.003. The calculation of the correction value is obtained through certain technical means, and we can't work it out. Otherwise, why do we need this table?

There is something wrong with your idea. It cannot be based on √ 0.00 1. What you need to do is aim at √5.723=√5.72+ correction value (that is, 3), and the corresponding result is =2.392+0.00 1=2.392.