To the best of my knowledge these two companies have different Manufacturer's Identification Codes. SCS - South Coast SeacraftTSA - Southcoast BoatsMy Hull Identification Number starts with TSA which is still associated with Southcoast Boats (presumably because the company name is still being maintained on file). However, I assume the South Coast Seacraft boats would start with SCS which is now associated with Stowe Canoe in Vermont. I assume the code was re-assigned because South Coast Seacraft is no longer on file.The name you found was invented by John Pollard at Sailnet. He assumed that Southcoast Boats and South Coast Seacraft were the same company so he added the word Explorer to distinguish it from the real South Coast 21. I assume that my boat is simply called an Explorer because this is what it says on the placard.I'm quite certain that my boat was built in Oldsmar Florida. The trailer is also from Florida and differs from the boat date of manufacture by only one month. If the boat were built elsewhere then presumably the trailer would have been also. Again, the placard name and location matches the registered manufacturer for the MIC on my boat's Hull Identification Number.Even a lack of identification is helpful because it suggests to me that my boat cannot be a common type with many different manufacturers. Apparently, mine actually is a limited production model with maybe only 50 units total. I assume that Southcoast Boats did indeed originate the design and molds. Otherwise, someone should be recognizing my boat as something else.