Depending on the situation, either lying on thier side with their head turned sideways and the neck slightly extended (to allow for the free flow ouut of their mouths) or by holding them uo, at the waist with their head and chest pointing down.
Nick I have been, in the past a life guard for about five years and I am also a rescue diver in the keys and a dive master. and the recovery position depends on the situation like if the victim hit their head or they just fainted, if they hit their head then the whole body needs to move all at once so that the spine is move in a different direction in case of a spinal injury, and if their is not a possibility of a spinal injury then you can just move their head to the side.
Moving the head only is always a no-no as spinal cord damage could result…we don’t have x-ray vision for inspections - we also don’t for the human body. The person should be laid on their LEFT side (because of human physiology)with the body in a supported position (if possible) in order to promote safety and avoid aspirating vomit.