To manage your routes and your ships first you have to go to your office (using the map). Once you are there you have to follow these steps:
1) Click on the button "BUY SHIPS" on the left hand side of the screen. When you click on "buy ships" a window with different kinds of ships will open up. Your purchase is limited to the cash available.
2) Once you have purchased your ships, according to the cash available, you have to click on "MANAGE ROUTES" on the left hand side. A window will open up where next to each of your boats there is a drop-down menu. Here, you can select the route you wish to assign that ship (for example: Corfu). Once you have selected the routes click on ACCEPT.
3) After having assigned each ship to a route (as you will see you cannot send more than 3 ships to the same port) click on END TURN and the system will inform you that you won't be able to manage your routes until the next turn commences. Click on ACCEPT and you will return to the adventure. If you don' t know which is the next step you have to take, click on "SKIP GAME" and you will get the next instruction.