What is the meaning of the 1:60 rule?

Question

Question Quiz SPL - Sailplane Pilot License - Navigation

QuizVDS · Accepted Answer

1 NM lateral offset at 1° drift after 60 NM

QuizVDS · Answer

6 NM lateral offset at 1° drift after 10 NM

QuizVDS · Answer

10 NM lateral offset at 1° drift after 60 NM

QuizVDS · Answer

60 NM lateral offset at 1° drift after 1 NM

Id 496 - SPL - What is the meaning of the 1:60 rule?