Men, women, juveniles below deck, plants and little fruit trees in a greenhouse above.

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Our double bunkroom below deck is narrow and spartan, but a perfect spot to curl up and read.

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With below deck Bluetooth speakers that stream music from smartphones, this ZBoard lets riders bump jams while cruising the boardwalk.

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As someone who has taken the plunge below deck, I can tell you, yachting is an industry of extreme highs and extremes lows.

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The room designated for these talks is below deck in a dark and dreary space, and when the lights go out for the PowerPoints, so do I.

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"You've got to be a little crazy, " says 58-year-old Maxine, who gets a thrill out of docking their 58-foot SkipperLiner intercoastal motor yacht while her husband stays below deck and watches news or sports on TV.

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They can carry up to 85 aircraft in below-deck hangars and have a combined ship and aircrew of more than 5, 000 servicemen and women.

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We are here hours before we even realize there is a terrace, with a glittering view of the Regent Street Christmas lights, so we feel a childlike awe to be high up amongst them, rather than viewing them from the top deck of one of the red buses way down below.

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"Whereas a pure sailing yacht is very sleek out of necessity, with pokey cabins and minimal deck-space, the gulet has lots of space below-decks for roomy cabins with proper bathrooms, " said Edward Granville, COO of Red Savannah.

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On the Disney Dream, pre-teens (ages 11 to 13) have access to Edge, a loft-style space on deck 13, distinctly separated from the other kids' areas eight floors below.

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