New Chelsea FC owner Roman Abramovich already owns the world's sixth biggest yacht, Le Grand Bleu, although he also is said to be looking for something more impressive now that the boat is slipping down the world rankings. Le Grand Bleu, often seen in British waters when it was owned a few years ago by - surprise, surprise - Paul Allen, holds the record for the biggest onboard tender, a gorgeous 75-foot Sunseeker motor cruiser that in itself represents an impossible dream for most mortals. The dinghy on the back of Le Grand Bleu's Sunseeker - a boat on a boat on a boat - is perhaps a more realistic acquisition.