Time for action — making the boat the proper length
Now that you've made the reference blocks the right size, it's time to make the boat the same dimensions as the blocks.
Change to the side view by pressing Numpad 3, and check in the upper-right corner of the 3D View window to make sure you are in Ortho mode. Press Numpad 5 if you are in Persp mode. Use Ctrl+MMB, and the mouse to zoom in, until the reference blocks fill almost all of the 3D View. Use Shift+MMB and the mouse to re-center the reference blocks.
Select the boat with theRMB. Press the Tab key to go into Edit Mode, and then choose the Vertex Select mode button from the 3D View header.
Press A to deselect all vertices. Then, select the boat's vertices on the right-hand side of the 3D View. Press B to use the border select, or press C to use the circle select mode, or Ctrl+LMB for the lasso select, as discussed in the previous chapter. When the vertices are selected, press G and Y and move the vertices to the right with the mouse...