High speed planing craft dynamics in irregular waves: Safety improvement using interceptor systems

• Conduct comprehensive towing tank experiments on a hard-chine hull equipped with various interceptor configurations across multiple speeds. • Evaluate the performance of the Transom Interceptor System (TIS) and Double Interceptor System (DIS) in different operational modes under irregular head sea conditions. • Utilize significant motion and acceleration heights (1/3, 1/10, and 1/100) to quantify interceptor performance and assess their impact on dynamic behavior. • Analyze the effectiveness of interceptors in reducing vertical accelerations and enhancing crew safety, in accordance with ISO 2631-1:1997, ISO 2631-5:2004, and EU Directive 2002/44/EC standards. This study investigates the potential for improving the dynamic performance and human safety of High-Speed Planing Craft (HSPC) in irregular head waves through the implementation of a Transom Interceptor System (TIS) and a Double Interceptor System (DIS). Experimental tests measure hull resistance, heave and pitch motions, and vertical accelerations in semi-planing, transient, and planing modes. The recorded data for the bare hull, the hull equipped with TIS in transient mode, and the hull equipped with TIS and DIS in planing mode are compared to evaluate the interceptor performance in improving the dynamics of HSPC. Additionally, the crew safety exposed to vertical acceleration is evaluated according to the ISO 2631–1 (1997), ISO 2631–5 (2004), and EU Directive 2002/44/EC (2002). The results indicate that TIS effectively enhances dynamic performance in transient and planing modes as well as human safety and comfort by reducing moderate vertical acceleration. However, in transient mode, TIS may amplify impact shocks, increasing the possibility of adverse health effects. Moreover, the DIS increases hull motions, vertical acceleration, and the potential for health and comfort risks in planing mode. These findings emphasize the potential of TIS in enhancing HSPC dynamics and safety, while it is crucial to optimize interceptor configurations based on operational speeds.