I'm guessing that you misread the vessel name and it was actually Chelsea,
as there are no USCG documented vessels named Checsea. You can go to this site, Office of Science and Technology
and enter the name to do a search for USCG registered vessels with the name you enter as part of a documented vessel's name. As you will discover, while there are no Checseas, there are lots of Chelseas. Good luck.