and now on submarines... A submarine (in short for submarine boat) is a watercraft capable of independent operation below the surface of the water. The term submarine most commonly refers to large crewed autonomous vessels; however, historically or more casually, submarine can also refer to medium sized or smaller vessels. Submarines in a neutral buoyancy condition are not intrinsically trim-stable. To maintain desired trim, submarines use forward and aft trim tanks. Eh? This is about technology:
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http://en.wikipedia.org/wiki/Submarine#Technology... so one can even lease submarines
... could be nice to be in a sub:
Image source: Stern.deor buy it straight away (unfortunately only in German):
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http://www.conleys.de/shop/produkt/U-Boot-/3794261...wuuaaahh: full of advanced technology...combining knowledge and technology from various disciplines.
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