George:
Before our friendship parted, I held private correspondence with Eric Sauder, perhaps, along with his brother Bill, the most knowledgeable LUSITANIA historians alive today. I recall Mr. Sauder sharing with me...the DELTA submersible was trapped on the wreck by a fishing net, the LUSITANIA is strewn with these, anyhow they had to eject the propellor cowling so as to regain ascent to the surface w/DELTA submarine. Subsequently, if I recall correctly, divers recovered the cowling. It resides as part of Mr. E. Sauder's LUSITANIA collection.
Michael Cundiff
NV, USA