First, paint a little less than half your canvas light blue with a super wet brush. When dry, use a foam brush to paint a few clouds and adding a bit of light tan to the bottom of the clouds.
Next, cut out a shape of ship and using a palette knife scrape various shades of blue paint mixed with molding paste on the canvas.
Then, paint the back of the boat.
Go back over the boat with a darker brown mixed with molding paste and draw into the paint with the pallet knife to create the lines of the boards of the boat.
Slap on some thickened white paint for the sails.
Use a black marker to outline a few areas to make them pop.