This is, technically, an xkcd forum.
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Title text: Our experimental aerogel iceberg with helium pockets manages true 100% efficiency, barely touching the water, and it can even lift off of the surface and fly to more efficiently pursue fleeing hubristic liners.
But we don't have to stop at ocean liners, ladies and gentlemen, I have big dreams to revolutionise transportation entirely by bringing something sorely missing from transoceanic flights! Yes, it is finally time for the looming threat of a collision with an iceberg to take to the air!