The caller may or may not tell you to circle a specific amount.
For example, if the caller says
Circle Left, then circle left until
the next command is given; on the other hand, if the caller says
Circle Left 1/2 Way,
then circle the given amount and then stop (1/2 way means to circle 1/2 way
around the circle, so you have changed facing direction by 180°).
EN: 30