There are 4PM and 6PM departures from West End to JVD. The JVD ferry always run close to those times.

It can be tight to get through Immigration & Customs in West End to depart for Jost on the 4PM. If you are delayed clearing Customs due Import Duty payments which can be slow and are a party of two send one person over to the JVD ferry and advise the crew your circumstance and they will always hold for a few minutes

The crazy thing is that BVI Ports & BVI Customs won't allow disembarkation until all luggage is off loaded which means Immigration & Customs processing is delayed. This is a chronic frustration here's hoping that will change

On our current trip to Jost we made the 4PM easily after a mid day arrival in STT ex MIA on American which departed MIA at ~09:00, prompt taxi to Red Hook and 2:30 PM Aquatic Rentals ferry to West End was the successful plan.

Normally we arrive ex ATL which arrives later arriving in STT and its tighter to make the 2:30PM. In this case we take a private taxi to expedite the STT/Red Hook trip

Hope that helps