"Zarpa" is actually probably "Zarpe" which is Mexican Spanish for "exit documentation" in other Spanish countries it is called a "Dispachio."
- - A USA boat and citizen does not need an "exit document" to leave the USA.
- - But - when leaving another country (e.g. Bahamas
, D.R. and all the other island/countries in the Caribbean
Basin and probably the rest of the world) you have to "Check-out" when you are ready to leave. The officials give you a stamped "exit document" which you hand in at the next country you check-in.
- - The idea is that each country wants to know who is visiting and where they came from and then who has left after their visit is finished.