Our only experience has been with TMM, not Moorings, but I don’t believe you can get your briefing done that late in the day Tues to be able depart weds am early. You still have to clear customers on Tortola which can take a bit of time. But you could be all ready to go with your provisioning and squared away on the boat.

As Mal said, don’t buy round trip ferry tickets. We’ve landed in STT at 2:30/2:45 pm many times and always made one of the ferries. We relied on Kevin (well known taxi driver) to get us to the best ferry to still make it to Tortola that day. We prearranged to have him meet us. The last known number I have for him is 340-643-0025. I’m sure others here can chime in on whether he’s still around.