Time for action — building the mast
Now it's time to start building the sloop. Since you have the template in the Blender file, you can build each object to the template and be confident that they will all fit together when you are done:
Press Numpad 3 to get the Side view. Use Shift+MMB to center your view on the mast and Ctrl+MMB to zoom into the mast so that the width of the mast in the template covers a third of the 3D View. Press Shift+S and select Cursor to Center from the menu. This makes sure that the 3D Cursor is centered with respect to the X axis, so your mast will be centered in the sloop. Place your cursor over the center of the mast in the template. Press theLMB to put the 3D Cursor there. Press Shift+A and select Mesh, then Cylinder from the menu to make a cylinder.
Press S and use the mouse to scale the cylinder so that it is about the same diameter as the mast, as shown in the following screenshot. Press theLMB to release the scaling.
Press the Tab key to go into Edit Mode...