Understanding the Nuances of Double Ended Ferry Designs

1. Understanding the Nuances of Double Ended Ferry Designs With excellent manoeuvrability and safety features, the double-ended ferries have lent unparalleled convenience in the movement of people and cargoes. The speciality lies in its open-ended design that allows easy loading and unloading of goods from both the ends of the craft. There is little wonder why shipowners want to buy double-ended ferries for sale, given their superb functionalities and convenience. As a distinct class of Ropax vessels, the double-ended ferries operate on short domestic routes, shallow water conditions, and confined ferry terminals. Due to their unique functional requirements, these ferries boast of the design and structure that are different from vessels’ construction. Keep reading to learn about such features. Hull Lines –The hull lines of these ferries are peculiar because they are symmetrical in relation to mid-ships. Broadly speaking, there are 3 major types of such hull lines and these are the round bilge, double hard chine lines, single hard cline lines. All of them have prominent V-shape forward sections to ensure enough breadth on the ramp for loading and unloading of goods. However, for the chine line (both single and double chines), the sufficient alignment in the local flow may minimize the cross-flow risk while ensuring separation free flow. The RANS CFD simulations can help resolve the mean flow before model testing. Appendages –Bulbous fins, skegs, fixed flat fins, thruster head-boxes, streamlines, and roll damping fins are usually included as typical appendages in the double-ended ferries for sale. While the skegs are meant to improve the course keeping, it is important to ensure that the skeg lateral area does not exceed the recommended measurement. This is because a large skeg area may build a side force, enhance the drift angle, and thus lend directional instability. Additional fixed fins can

2. also help with the course keeping, and thrusters will ensure sufficient submergence and avoid the chance of ventilation in the ship. Since these appendages play a critical role in determining shipping operations, you must check them before purchasing a vessel. Propulsion Arrangement –Due to their exclusive design and manoeuvrability, the double-ended ferries require typical propulsion arrangements like a single propeller and twin wing pod/thruster units. To improve the course keeping, the single propeller can be combined with either additional fins or the rudder of the ship. Generally, the placement of the propellers/rudders/thrusters in relation to the hull is determined by factors like sufficient propeller submergence, the ventilation risk, and manoeuvrability. On the day of inspection, you should take an inspector who can look into these technicalities and check their functional status. Latest Design Trends –With the emergence of new construction style and art, the design for double-ended ferries is improving at a rapid pace today. The recent construction trends allow easy access paths for people with disabilities, speedy vehicle clearance, greater security features, and so on. Integrated with active and passive fire protection measures, the vessels are reducing the risk of a fire breakout and ensuring the safety of all passengers and cargoes. Moreover, large passenger cabins and seating arrangements are aimed at improving the shipping experience of all people. Most importantly, the rise of sustainable technologies has paved the way for eco-friendly shipping practices with minimal environmental impacts. Conclusion– Now that you know these trends, you will know what exactly to look for in the double-ended ferries for sale. Do you want to have expert consultation for making the right choices? At Norwegian Ship Sales, our professional advisors can tell you all about the latest market trends and protect your interests in the process. So, why wait? Book your appointment now. Resource: https://sites.google.com/view/norwegianshipsales/blog/understanding-the-nuances-of- double-ended-ferry-designs --------------------------------------- Norwegian Ship Sales Rådmann Halmrasts vei 18, 1337 Sandvika, Norway Website: www.norshipsale.com Email: info@norshipsale.no Phone: +47 6754 1925 / +47 9177 6183 Follow us on: Facebook Twitter