Nigel Iren's iLan Trimaran Concept Here’s some really innovative thinking that has resulted in a number of record voyages: Nigel Irens’ Ilan trimaran concept. With roots in sailing trimarans, these power tri’s are ultra-efficient record setters. The smaller iLan Voyager set a round-Britain record, and the larger Cable & Wirless Adventurer set a round the world record. The Adventurer achieves about 1 mpg, which is maybe not that bad when you consider that my diminutive Bardick gets about 20 mpg, and the iLan Voyageur weighs in at 53 metric tons—more than 200 times the displacement!