Not going to go through the steps of the flag, thats all in the tutorial I used. The following steps will show how I built up my own additions to create a scene.
step 2 of 7
The crows nest, this was just done manually. I used a bunch of cubes and a few cylinders.
step 3 of 7
To make the ropes you want to draw some splines and sweep them with a circle. Manually place some spheres for the connections.
step 4 of 7
The telescope was a last minute addition. with some smoothed cylinders and a curvy thing.
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This is what it all looks like together.
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The sea was a huge plane with loads of segments affected with a formula effector to create waves. Play with the settings to get it looking right for different scenes.
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Final step, just got some lights dotted around, a default sky at night time setting and the basic camera.