Glossary Term
FDHF (Fast Displacement Hull Form)
Fast Displacement Hull Form, commonly shortened to FDHF, is a hull concept intended to combine the efficiency and comfort of a displacement-oriented yacht with the ability to run at higher speeds than a conventional displacement hull. In yacht use, it is meant to widen the efficient operating envelope instead of optimizing the vessel for only one narrow speed band.
For owners, the attraction is flexibility: the yacht can cruise economically at lower speeds yet still deliver higher-speed performance when required. Achieving that balance depends on hull geometry, displacement control, weight distribution, and engineering choices, so the result is very design-specific and cannot be judged by the acronym alone. FDHF is usually discussed alongside displacement, semi-displacement, and planing behavior because it sits between those familiar expectations. In practice, the term signals a yacht designed to preserve comfort and range-minded efficiency while still offering a faster top end than a traditional passagemaker.