Motor yachts are generally any vessel capable of providing overnight accommodations, not intended specifically for fishing, that are propelled by diesel engines. They range in the size from around 35 feet to 100 or more feet. Vessels larger than this maybe categorized as mega yachts or super yachts. The vast majority of motor yachts built today are fiberglass, and unlike trawlers that operate at a slow economical speed; are more often capable of speeds of 20 or more knots. Their accommodations will include two, or as many as four staterooms, for owner and guests. They also provide a fully galley, heads, (all so referred to as bathrooms) and, typically, comfortable outdoor spaces protected by an overhead structure to provide protection from the sun and rain. A flybridge is a popular item on many motor yachts and those vessels are also referred as flybridge motor yachts. Cockpits are also component on some motor yachts, in which case they may also be referred to as cockpit.