The "Jade Beach Wreck" lies just north of the Sea Watch Restaurant off the Jade Beach condo. Always wondered if jade was found in this area to give it the name.
A local diver Tom Holland found the wreck many years ago (60's) and recovered bronze spikes and found a ballast pile. Another diver found a spike off this wreck with the name "Birmingham" on it so it's probably a British ship. John Brandon also worked on this wreck years ago and ID'd it as a nineteenth century wreck.
I've searched the area years ago and I didn't find anything, though this was after beach re-nourishment started, and much is probably buried under the beach now. There were many Mag-hits in this area that were never excavated. Go a little further south and you'll find lots of 50 caliber bullets from WWII as the wreck of the Copenhagen lies just offshore and was used as target practice.
As far as the Tifton goes, I believe we found that wreck a few years ago and it lies off Boca.
Source: Shipwrecks of Broward County by Singer & Dean