According to the Croatian law, at least one person on the vessel must posses valid nautical and VHF licences.
List of valid nautical certificates for bareboat charter in Croatia (PDF).
Charter guide

Itinerary 7-day route

Base info
Turistic tax: Euro only (1,4 €/day/person)
Transit log: cash, Mastercard or Visa
Security deposit: Mastercard, Visa or cash
Insurance of deposit per week:
250 € for boats up to 39 feet
350 € for boats 40 – 50 feet
500 € for boats 51 feet and more
Insurance notice: if made in Garant, the price is
250, 350 or 500 € (nonrefundable part)
+ 300 € (for boats up to 50 feet)
or 500 € (for boats 51 feet and more)
refundable part, for the cases when:
1. boat comes back with empty diesel tank
2. come back with blocked toilet
3. do not come back on time If made in other insurance company, it is necessary to leave the deposit.
In a case of accident, Garant Charter issues confirmation and insurance company gives you back the deposit.