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Search operations are ongoing for Mazu Yachts co-founder Halit Yukay following a collision between his yacht and a cargo vessel in the Sea of Marmara.Yukay, 43, was travelling from Yalova to the Greek island of Mykonos when the incident occurred. His family reported him missing on Monday, 4 August. The wreckage of his yacht, Graywolf, was later found off the coast of Marmara Island. Rescue teams, including divers, have been working in the area since, but no trace of Yukay has yet been found."The privacy of Mr. Yukay’s family and Mazu Yachts’ team members remains a priority during this time," the company said in a statement. "We are deeply grateful for the thoughts, prayers, and support extended to us. Verified updates will be shared through our official channels as they become available."Yukay co-founded Mazu Yachts in 2011, initially focusing on chase boats before expanding into the semi-custom yacht sector. The yard’s portfolio includes models such as the 24.9-metre Mazu 82 and the 40.2-metre flagship 132 DS. Its 28.5-metre Waterlily was a finalist at the 2024 BOAT International Design & Innovation Awards."Halit is a friend and a constant source of inspiration and bold ideas," said Nicola Pomi, head of Volvo Penta’s yacht division. "Today, while we hope and wait, we hold on to his spirit. We are closely following the ongoing search and rescue efforts, and our thoughts are with Halit, his family, and the Mazu team."Credits: Coast Guard Command (Turkey)

Oceanco has launched the 111-meter diesel-electric yacht Leviathan, previously known as Project Y722, at its facility in the Netherlands. The vessel features naval architecture by Oceanco and Lateral Naval Architects, exterior design by Oceanco, and interiors by Mark Berryman Design.Commissioned by an experienced owner, Leviathan was developed with a focus on operational efficiency and crew wellbeing. According to Oceanco, crew members were involved in the design process to provide practical input. The yacht incorporates durable, low-maintenance materials such as honed stone, natural wool carpets, composite capping rails and decks, and full-height glass superstructure bulkheads, replacing more maintenance-intensive elements like teak decks and polished wooden handrails. These choices are intended to reduce routine upkeep and allow crew to focus on guest services and operational tasks.The project involved collaboration between the owner, technical representatives from YTMC, and management company Y.CO. More than 2,000 people contributed to the build, and their names are engraved on a glass panel in the main staircase.Leviathan is designed to accommodate a variety of uses, including hospitality and scientific work. She has a beam of 17.8 metres and is scheduled to begin sea trials in the coming weeks. Further details on her capabilities are expected to be released later.Credits: Oceanico

Lürssen has launched the 114-meter megayacht Cosmos, a hybrid vessel equipped with two 500 kW methanol fuel cells that enable emissions-free cruising for extended periods. The yacht, introduced as part of the company’s 150th anniversary, can travel up to 1,000 nautical miles on electricity alone and remain at anchor with zero emissions for up to 15 days.Commissioned by an undisclosed owner, Cosmos features an all-steel hull reinforced to Ice Class 1D, allowing navigation in polar waters as well as across all major oceans. Alongside its methanol-based hydrogen power system, the yacht is fitted with diesel generators, engines, and tanks to allow conventional propulsion for higher speeds.Designed inside and out by Marc Newson, the vessel has a beam of 18 metres (59 feet), a gross tonnage of 6,300, and spans six decks. The design incorporates extensive use of glass, including a custom-engineered glass-domed owner’s study offering 360-degree views, a surrounding sky terrace, and an observation lounge located beneath the helipad.Outdoor amenities include a main deck with a swimming pool, Jacuzzi, seating areas, and an aft dry dock for tender operations. The combination of ice-class construction, hybrid propulsion, and large-scale glazing represents Lürssen’s latest application of advanced engineering to meet evolving environmental and design goals.Credits: Lürssen

Feadship has delivered the 71.76-meter superyacht Stella M to her owner on 5 August 2025. Built at the Dutch yard and designed by Studio De Voogt, the vessel features five decks and a layout intended for multi-generational use.The yacht is equipped with a next-generation diesel-electric propulsion system, designed to reduce noise and vibration while supporting cleaner cruising. According to Feadship, sea trials confirmed notably low noise and vibration levels.The project was carried out in collaboration with Burgess, representing the owner throughout the build, and Hugo-Morgan Harris acting as technical representative.“Every detail was shaped by a shared ambition to create something exceptional,” said Maarten Janssen, Feadship Sales Director. “Her advanced diesel-electric propulsion system has resulted in remarkably low noise and vibration levels.”Burgess Senior Partner Richard Lambert commented: “Her Dutch pedigree coupled with complete collaboration between all parties resulted in a vessel that meets the owner’s forward-thinking vision.”Stella M is set to begin her first Mediterranean season following delivery.Credits: Feadship

The 76.6-meter motor yacht Boadicea is now available for charter through Northrop & Johnson, with Mediterranean itineraries this summer followed by Caribbean and Bahamas deployments this winter. The 1999-built Amels flagship, designed by Terence Disdale, carries a weekly rate of EUR725,000 plus expenses.Recent refits have maintained Boadicea's competitive position in the charter market, including installation of a 12-seat cinema theater and exterior repainting. The yacht offers 2,191 GT of interior volume across five decks served by an elevator and spiral staircase.Accommodations include nine staterooms for 18 guests, featuring two master suites - one on the upper deck with private terrace and dual bathrooms, another forward on the main deck. Common areas comprise a walnut-paneled main salon, upper deck lounge with Roche Bobois furnishings, and multiple entertainment spaces.Outdoor amenities includes sundeck with 6-meter counter-current pool, bridge deck wellness area with gym and spa facilities, expanded beach club with inflatable sea pool platform, 13-meter Pirelli chase tender plus extensive toy selection.The yacht's recent updates preserve Disdale's original design while incorporating modern charter requirements. Boadicea remains one of the largest vessels available for private charter, offering rare volume in the 70+ meter segment.Northrop & Johnson will manage bookings for the 2024/2025 charter seasons, with the vessel currently positioned in the Mediterranean. The Amels-built superyacht joins the brokerage's portfolio of large-tonnage charter options.Damen Yachting, the yacht-building division of Damen Shipyards Group, employs approximately 500 professionals across its Amels, SeaXplorer, and Yacht Support vessel programs. No purchase price was disclosed for the new build.Credits: Northrop & Johnson