We believe our crew members provide world-class service and we hope you agree. We do not add an automatic service charge to your account as we prefer that guests reward our crew solely based on their performance at the end of their cruise. If you would like to do so, any amount you feel appropriate is truly appreciated. However, for guests who might wonder what the typical amount is, we suggest each of our passengers to leave in between US $250 – $300 per week which is the international standard for a First class vessel Letty and between $300 – $350 which is the international standard for a luxury vessel Origin & Theory. Cash is our suggested method of payment on board. You could also charge the gratuity to your credit card by using your Visa or MasterCard. Gratuities are distributed among all crew members including naturalist guides.