Looking at the propeller as it is being lifted from the water, I was struck with a little anomaly. There is NO
Propeller Shaft attached. If a boat was wrecked, wouldn't the propeller shaft still be part of what's on the bottom?
Removing a large propeller from its shaft is no easy task in the best of times..never mind underwater. I can't envision an earlier salvor disassembling the two large and heavy parts just to take the shaft and leave the prop for a later time. No hard hat and no scuba.....Maybe this propeller was being transported on a barge or vessel (as deck cargo) when the vessel sank...OR... the vessel took a roll in a squall and the prop went over the side, which might explain why no other vessel remains have yet been found.
BTW:
Tug Boats usually have MUCH bigger props than another vessel the same size. Just something else to think about.
NB