A high speed performance at sea can give an operator a tactical or economical advantage. The success rate of some missions, like Search And Rescue (SAR) operations or patrol duties, is even largely dependent on a quick arrival time of the ship and, thus, demand a high operational speed during daily operations, irrespective of the particular ambient wave conditions. However, a high speed performance in a seaway is often associated with a rather violent motion behaviour in which the resulting large wave impacts, or vertical peak accelerations pose a rather important limiting factor for the vessel’s operability. These impacts not only endanger the safety of the people on board but may also compromise the structural integrity of the ship. Over the past decades, several innovative fast hull forms have been developed in order to reduce these larger wave impacts. One of these designs is called the Enlarged Ship Concept (ESC), in which the length of the hull is increased to enable an optimization of the bow sections from a hydrodynamic point of view (Keuning and Pinkster 1995). This design evolved later into the Axe Bow Concept (ABC), which has an even more radical bow shape to further improve the ship’s behaviour in waves (Keuning 2006).

This content is only available via PDF.
You can access this article if you purchase or spend a download.