Roman Abramovich, his girlfriend Daria Zhukova and his yacht Eclipse

Roman Abramovich, his girlfriend Daria Zhukova and his yacht Eclipse

Can a boat simply be too big? Ask your average Saudi or Russian multi-billionaire and they'd probably say of course not. Ask your average mere mortal and they might well beg to differ, and a recent event would underline their point.

The Chelsea FC owner Roman Abramovich's yacht Eclipse, larger than a Channel ferry and currently the world's biggest private craft, has just been refused entry to the elite aquatic playground that is the Royal Yacht Club Antibes. The only berth big enough to take it was already occupied, by an 80-metre yacht - half the size of the Russian's - already owned by the Saudi sheikh Prince Aziz al Saud.

For the rest of us, the nearest we'll come to enjoying the mega-rich lifestyle is by chartering a vessel or taking a luxury cruise. But if you've never been on a boat with its own swimming pool and spa, beach deck and cigar bar - not to mention personal submarines and a missile defence system (hello, Roman! OK, it probably does make sense when you're that rich) - we've done the work for you. Here's our guide to Eclipse and the rest of the most luxurious boats afloat.

Chris Alden is a freelance travel writer.