Final answer:
If batter boards are properly offset, they allow the end user to continually re-string the layout to double check accuracy without setting up an instrument.
Step-by-step explanation:
If batter boards are properly offset, they allow the end user to continually re-string the layout to double check accuracy without setting up an instrument. This means that the end user can easily verify the accuracy of the layout multiple times without the need for additional equipment. Batter boards are used in construction projects to establish reference lines and help ensure accurate measurements and layouts.