Orange oic International College ..let's achieve together Part 2: Record Table 1 Learner readings and Point A Staff reading 1 Point B Staff reading 2 Point B Staff reading 2 instrument location Reading 1 (Learner 1) ( Midpoint ) Reading 2 (Learner 2 )(4 m behind A or B) Difference between A minus B is mm . Part 2: Record Table 2 Learner readings and Point A Staff reading 1 Point B Staff reading 2 Point B Staff reading 2 instrument location Reading 1 (Learner 1) ( Midpoint ) Reading 2 (Learner 2) (4 m behind A or B)