I sailed the Seabourn Pride from St. Thomas to Barbados in 1995, with a ship's tour of Barbados after disembarking. Lots of beautiful beaches to see and experience. I'm sure the Pride has a late departure time because Barbados isn't accessible by non-stop flights, so it takes folks a while to get there. But as was mentioned, you can board the ship much earlier, maybe as early as 1pm. Certainly you want to be onboard before drinks and dinner.