Appeal a turn toward second.

[celebur]

Originally Posted by shagpal

it bothers me that an advance attempt by batter-runner towards second is an "appeal" at all.

Others have also brought this up earlier in this thread. In my opinion, it is listed as an appeal in order to emphasize that whether a runner is or is not in jeopardy after overrunning 1B is in the judgement of the umpire and the umpire is not to convey their judgement until and unless the defense tags the runner.