Apart from your flights/transfers, extra costs are for food/drinks (grocery shoppings for on-board breakfast/lunch and on shore dinners), the occasional national park entrance or harbor fee. All these costs will be shared by the crew members using a common wallet (a so called kitty). According to custom the skipper is exempt from contributing to the kitty and it will be managed by one of the crew members. Estimated costs per person for the common wallet are around € 250 for the whole week.