Abstract
This paper presents seakeeping test results for a coastal patrol ship (CPS) in the Croatian Navy (CN). The full-scale tests were conducted on a CPS prototype that was accepted by the CN. The seakeeping numerical prediction and model tests were done during preliminary project design. However, these results are not fully comparable with the prototype tests since the ship was lengthened in the last phases of the project. Key numerical calculations are presented. The CPS project aims to renew a part of the Croatian Coast Guard with five ships. After successful prototype acceptance trials, the Croatian Ministry of Defence (MoD) will continue building the first ship in the series in early 2020. Full-scale prototype seakeeping test results could be valuable in the design of similar CPS projects. The main aim of this paper is to publish parts of the sea trial results related to the seakeeping performance of the CPS. Coast guards around the world have numerous challenges related to peacetime tasks such as preventing human and drug trafficking, fighting terrorism, controlling immigration, and protecting the marine environmental. They must have reliable platforms with good seakeeping characteristics that are important for overall ship operations. The scientific purpose of this paper is to contribute to the design process of similar CPS projects in terms of the development of seakeeping requirements and their level of fulfillment on an actual ship.
Highlights
This paper presents the seakeeping requirements for a coastal patrol ship (CPS) for the Croatian Navy (CN) and the results of the full-scale seakeeping performance of the ship
Following Reference [9], the CPS should be fully operational at mid sea state 4 (H1/3 = 1.8 m) following the World Meteorological Organization (WMO) scale, but not including the launch and recovery of the rigid hull inflatable boat (RHIB)
Launch and recovery of the RHIB should be feasible at sea state 3 (H1/3 = 1.25 m–WMO) and with the CPS sailing at least 5 knots with heading waves
Summary
Full-scale ship sea trials are the most important test of a ship’s structure, equipment, and crew in order to prove its security, reliability, and operational capability. Reference [2] presents validations of ship motion predictions using model tank tests and full-scale sea trials for a Canadian naval destroyer. A new experimental methodology to accurately predict wave-induced motions and load responses of ships was proposed in [4] It is based on self-propelled large-scale model measurements that were conducted in natural environmental conditions. Patrol vessels must have good performance criteria for seaworthiness, and an analysis of the hydrodynamic aspects of a ship’s design is one of the designer’s primary tasks [6] This analysis describes ship motion and ship resistance. The seakeeping characteristics required for the successful operation of a mother ship and inflatable boat were analyzed
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
