Regarding the AutoCAD lighting study of just the hard components.
The time of the day that the worm gear is in sunlight and does not have a shadow on it cast by either the axle, hub or brake falls within a somewhat small window. The worm gear first gets sunlight at about 11:45am, although not lit brightly at all. It gets brighter and brighter afterwards as the sun angle changes, and then the brake starts to cast a shadow on it at 1:15pm. By 1:45pm the axle starts to cast a shadow. In my opinion what may be the worm gear in the Bevington Photo is well lighted except for area which may be underwater.
From his diary, the only time Bevington could have taken the picture was when they departed the island. He said he arrived back at camp at 11:30, had lunch, raised the flag and headed off. I’m not sure how long it takes to cross the reef but the ocean seems very calm in the photo.
I would be interested to hear from expedition members on the forum regarding how much time they typically spent crossing the reef in calm waters and loading the skiff, or an estimate for loading a small boat. What would be a reasonable time or window?