HELP!!! Cruise ship tycoon problems.?

Im new to the game "Cruise Ship Tycoon". If anyone has ever played before, could you help me out a second? While i was out at sea, i ran out of fuel. So they brought my ship to a small island. Then i had this countdown before departure...and finally the time came. It keeps saying "DEPART NOW!!! YOUR REPUTATION IS GOING DOWN!" But i have no idea how to depart! I looked everywhere for a on! Can someone please help me? Thanks!