Those are some pretty amazing pictures. There are some videos on YouTube that were taken about the same time.
http://www.youtube.com/watch?v=hbfMa05SReQ
http://www.youtube.com/watch?v=GC2BtqHZdd4
http://www.youtube.com/watch?v=YsqKeose3yM
I think the first three videos were shot from the dive boat that was tied up next to El Duque on that last OEX San Carlos trip.
http://www.youtube.com/watch?v=KXHigt3DD3o
Hey Brent - any plans for more San Carlos mothership trips? After seeing these videos, I'd like to go back down there.