Dutch boatbuilder Holterman Shipyard is expanding its X-Treme series with the introduction of the X78 Fly, a 23.9-meter model currently under construction at the Meppel facilities. Scheduled for delivery in early 2024, the X78 Fly is an evolution of the X-Treme 78 Sport model, specifically designed for warm-weather cruising in Dutch canals and northern waters.