"Who really cares if the database is full of abandon ships."
Ah, the military cares. Remember that one of the primary purposes of that list, is to let the government know "Where can we get a ship?" and that means they have to be delisted when they change hands or are abandoned.
Yes, we have come a long way since the days of the WW2 antisubmarine patrols by sailing yachts off New England. But ships and boats alike are listed for the same purposes, and clear title is only one of them.
Actually, my boat name had a predecessor in the USNavy. SP639
Since the motor yacht that was taken over by the Navy was built and based in Bristol RI, which is where I bought my boat, that just confirmed to me that I should go w/ that name.