Alexis is a yacht concept in the Goliath Series of yachts from Steve Kozlo (thegoliathseries.com). Designed to be an expedition yacht, Alexis is 384 feet long, has nine decks, four Cummins QSK60-M diesel-electric engines and a range of 22,000 miles at 10 knots. No fewer than four small helicopters can fit in the hangar, and a large garage can hold two submarines, multiple tenders and assorted water toys. Two swimming pools — one on the bow and one at the stern off the owner’s suite — feature hard covers, so the pools don’t have to be drained while the yacht is underway. Heated doors and handrails minimize icing on those journeys way far north or south.