A monohull is a type of boat or ship that has a single hull or a single main body that runs the length of the vessel. The term “mono” means “one” in Greek, hence the name monohull. In such a design, the hull is typically narrow and pointed at the bow, with a wider and flatter section at the stern. This shape allows the hull to cut through the water with less resistance and achieve higher speeds than other types of hull designs, such as multi-hull boats.
A Monohull boat can tack quickly and is much more manoeuvrable and is faster to respond to the helm than other hull types. Sometimes when you don’t slow down when turning you will make a sharp one that looks kinda like it is out of control. Unlike a multihull, it can slice through the water effortlessly without “slapping”.
Multihulls are a type of boat or ship that have multiple hulls or bodies that run parallel to each other, instead of a single, central hull like a monohull. There are two main types of multihulls: catamarans and trimarans. A catamaran has two parallel hulls, while a trimaran has three hulls, with the central hull being larger than the outer two.
Catamarans are usually faster than monohulls but can slap a lot at high speed. They tend to sail faster when not overloaded. And they are generally easier to control.
Extensive slapping of a multihull: