The base holds his hands approximately shoulder width, as he would turn the hands of the flyer inwards when positioning more narrow. The palm is open so that the flyer has the largest possible space available. The thumbs are as close as possible to each other. The wrist is located above the upper arm and must never come before the elbows.
The lower arms are aligned in the direction of the center of gravity of the flyer to ensure good stability against shear forces.
The position “Base standing, short arm” is an important starting position for dynamic tricks in duo-acrobatics …
Also note the special case throw!