The one at the back is commanding the ship - I tried to make him look like an old experienced sailor.
The one at the front is a younger man wearing nice sunglasses and a cool hair style. The ´younger´ lego figure is also wearing a life jacket which makes the sailor seem professional because he is not wearing one - he is probably very confident.
You might have noticed the kind of bumpers on the side of the boat. They are to avoid the boat from hitting when it is close to the port. Sadly, I don´t remember what bricks were used.
Finally, I put a flag at the back. In real boats it´s supposed to be of a country, but I only have single coloured and flags designed for racing sets.