Karina is the first of a series of Hybrid Fast Supply Intervention Vessels of 55m in length. In 2014, back-to-back sea trials with and without Hull Vane were carried out. The results were unambiguous: The required power was reduced by 12% at 12 knots and 15% at the vessel’s maximum speed of 20 knots.

In this video the effect of the Hull Vane® on the seakeeping properties of Karina is visualized. On the left, the vessel is displayed without Hull Vane®. On the right, a Hull Vane® is included. In the middle, respectively the heave, pitch, acceleration at 0.9 LWL, and the resistance are shown for both vessels. The tests were carried out at 20 knots, in typical wave conditions: HW = 1.0 m, TW = 5.7 s.

The inclusion of the Hull Vane® leads to a 10% reduction of the vertical accelerations at 0.9 LWL and even up to 20% on the aft deck. The resistance reduction is even more than in calm water, showing that the Hull Vane® is even more effective in waves.

These results underline the benefits of (retro-)fitting the Hull Vane® to the aft of a vessel. This leads to increased comfort, a broader range of operability, and a reduced resistance of the vessel, in calm water and waves.

Read more on www.hullvane.com.