All vessels have their own roll period depending on hull shape and loading. Wave motions initiate this roll and, if in close synchronization with the hull’s natural roll period, roll may build to uncomfortable or even dangerous proportions.
The principle behind NAIAD fin stabilization is to counteract the tendency of a vessel to roll with an equivalent and opposite righting moment applied in exactly the proper phase and proportion. These righting moment forces are typically generated from a pair of underwater fins, although other control surfaces are also available. Wave forces are thus prevented from aggravating the vessel’s natural tendency to roll.
A rolling boat does not operate at maximum efficiency and over a long course, steers a zigzag track. With the advanced NAIAD active roll stabilizer system, a vessel steers a nearly straight course, often actually improving fuel economy.