Many waterjet boats experience course keeping problems. This is due to the missing underwater lateral area that helps the vessel to keep its course. An added lateral area is most efficient when installed in the very aft of the hull. Having a wing profile fin gives a corrective force on yaw with minimum resistance. Humphree has developed a series of fixed fins that can be bolted to the hull. The bolts have been tested and verified to break off and keep the hull intact to limit the damage to the boat in the event of collision or grounding.
|Sub-cavitating stabilising fins (below 40 knots)|
|Several sizes available, HFF400 and HFF650|
|Base-ventilated stabilising fins (above 40 knots) HFF500|
|Several sizes available, HVFF300 and HVFF500|