A highly efficient diesel-electric propulsion system is among the highlights of the recently introduced Wider 125 (wider-yachts.com). According to the Italian builder, the system will help the all-aluminum yacht achieve a range of 3,600 nautical miles when cruising at 10 knots. The 125 will also be able to travel in a zero-emission mode that uses only battery power. The design calls for a master stateroom on the main deck and four en suite guest cabins below deck. At the stern, the garage door opens and the swim platform slides back, creating a spacious, partially shaded beach club with a plunge pool.