Name and meaning of stance where you stand with fists on hips?

By | December 10, 2016

After the first Kiai in Heian Sandan (source):

Bring left foot to the right, pivot left 180 degrees on the right
foot, informal-attention stance (slowly), bring fists to hips, elbows
to the sides, backs of fists face forward

The stance at the bottom-right corner of the image below, marked as the 11th move (image taken from here):

enter image description here

We didn’t get to study this Kata’s Bunkai yet in the class I attend.
What is the meaning of this move and stance? To a novice like me it seems like a vulnerable position that I wouldn’t expect to being used in combat.