Trimaran sailplan. They contribute to drag when heavily immersed, and their level of immersion indicates when to reef. Two types of trimaran exist: the regular trimaran and the open trimaran, which features a trampoline between the hulls instead of plating. Trimarans have a number of advantages over comparable monohulls (conventional, single-hulled sailboats). Given two boats of the same length, the trimaran has a shallower draft, a wider beam, less wetted area, and is able to fly more sail area. In addition, because of the righting moment provided by the wide beam, trimarans do not need the weighted keel that is required
Luzzu times. The design has survived because it tends to be sturdy and stable even in bad weather. Originally, the luzzu was equipped with sails although nowadays almost all are motorised, with onboard diesel engines being the most common. Luzzus are brightly painted in shades of yellow, red, green and blue, and the bow is normally pointed with a pair of eyes. These eyes may be the modern survival of an ancient Phoenician custom (also practiced by the ancient Greeks and Egyptians); they are referred to as the Eye of Horus or of Osiris. They are said to protect the fishermen