What is a key feature of a displacement hull?

A displacement hull is specifically designed to move through water by pushing it aside rather than gliding over it. This characteristic allows the hull to be more efficient at lower speeds, which is particularly beneficial for vessels intended for cruising or longer journeys. The design of a displacement hull typically features a fuller shape that displaces a significant amount of water, creating buoyancy and stability while traveling through the water. This design is most effective when the vessel is operating at slower speeds, as it maintains a steady motion and provides a comfortable ride.

The other options refer to attributes of different types of hulls. For example, gliding above the water surface and allowing for high-speed travel are traits more associated with planing hulls, which are optimized for speed and performance. Luxury cruising vessels can have various hull types, including both displacement and planing hulls, depending on their intended use. Therefore, the primary function of a displacement hull is centered on its efficiency in slow-speed travel, making it particularly suited for long-distance cruising.