Despite her impressive dimensions, she is not officially the largest motor yacht in the world, a record held by the 160-meter (525ft) Dubai.

CNN: Al Salamah: The ultimate yacht

In 1998 he left the business in his partners' hands, returned to Pier 66 and bought a 52-foot motor yacht he named Southern Lady.

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If De Waal wants to bring along more friends--or his 30-member racing crew--they have to sleep aboard his 130-foot motor yacht, the aptly named Bystander.

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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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That didn't affect the Perrys, but their neighbors at Marina Bay, Sally and Keith Huzyak, used the mortgage deduction to the max when they combined the mortgage on their primary home, a Lake Tahoe condo, and their 66-foot Pollycraft motor yacht, the Bes-ame ("kiss me" in Spanish).

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As well as all the expected mega-yacht accessories such a helipad, Jacuzzis, cinema, motor-launches and interior design by a famous stylist -- in this case Britain's Terence Disdale -- she also possesses a number of unique extras, notably an indoor swimming pool covered by a glass roof.

CNN: Al Salamah: The ultimate yacht