The qualifications you need to hire a boat or yacht will depend on the country and region where you plan to sail. In Croatia, for example, you are required by law to have a valid sailing license or certificate to operate a yacht or boat.
The type of license or certificate you need will depend on the size and type of vessel you plan to operate. If you have a valid sailing license or certificate from your home country, it may be recognized in Croatia.
If you don't have a sailing license or certificate, you can hire a skipper to handle the yacht for you.