If you leave the USVI on a charter boat with crew aboard, you do not clear out. You go to the BVI ( the foreign country) and clear IN.

When you get to the BVI, you are required to clear in. If you leave the BVI for the USVI, you must clear out of the BVI and back in to the USVI, because you have crossed an international boundary.

If you change crew aboard, and didn't have to clear out the first time you left the USVI , why would you need to do anything different the second time ( o r the 3rd or the 4th, or for a charter boat changing crew weekly, any other time ?)

Interesting topic, for sure. Thanks to all for their input.