Judging by the shadows the time is about midday. That means that the navigator, the chap in the blue suit and helmet, is putting the casualty in the left hand seat so that the pilot can keep an eye on him, The Sycamore, because its take off performance is so bad, will fly the casualty to wherever and then return for the navigator.
In El Adem the pilot would winch the survivor up, who then had to get in by himself, and the winchman would wait in the dinghy for the Sycamore to return.