Supine unilateral shoulder abduction/adduction BC (Shoulder abduction/adduction buoyancy counterbalanced (unilateral), supine)

Lie on your back with the wall to your side and a noodle under your hips.
Hold onto the wall with your nearest hand, you will be exercising your opposite shoulder.
Rest your head back into the water and keep your body flat.
Slowly take your arm out to the side with your palm facing up.
Reach above your head keeping your arm on the surface of the water.
Return your arm to your side.