is not accepted in the french caribbean
. your boat is not confiscated, you will be asked to leave. there was some talk at one point of fines, i'm not up to date on that.
the virgin islands
is exempt from this rule
as you must have a u.s. address to document a vessel. french customs
will ask if you LIVE in the virgin islands
. it is $5/foot to register a boat in the virgins and very simple. dinghy
must be registered as well. perhaps easier for you than documentation