Unknown to me, on the very day I took this photograph, my brother,
who owns a metal fabrication business that works a great deal in
material handling and dust collection equipment, was working at
this facility on this ship. If you look up by the ship's stack,
attached to the elevator is a blue piece of duct work, that is a
part of the system my brother was installing at the very time I
was taking this photograph.

I knew nothing of it until a family dinner today, Thanksgiving.

More information on the Herbert C. Jackson http://www.boatnerd.com/pictures/fleet/hcj.htm