The above image seems to be the first time we see the aircraft in the water. After this, the pilot Josh returned to the airfield to seek help, finding no one there, he returned to the scene and by the time he flew over the striken plane again, this is what he photographed:
Meanwhile, in the water, some of the survivors are making their way to the wing while the plane is slowly going down, nose first because that's where it's the heaviest:
In the above it looks like Fuddy isn't out of the aircraft yet, and Yamamoto is waiting for her on or near the steps.
Now she's out, the passengers have made their way to the wing, and the two windows near the wing are submerged.
The difficulty appears to be in trying to establish just where the passengers were when Josh took the second photograph. It looks like they had drifted a considerable distance before the aircraft actually sank.
And so they had, see how far Puentes is from the aircraft now? If that's about the amount of time it took for Josh to return to the airfield, find no one there, get back into his aircraft, taxi down the runway, take off, fly back to the scene, the passengers would have been that far from the sinking plane.