The motoryacht is the most general term to describe an engine-powered yacht, typically larger than a cabin cruiser, starting at about 60 feet, and intended for longer-duration cruising trips.

Motoryachts can have either a semi-displacement or a full displacement hull. A semi-displacement balances speed and stability. The hullform also allows as much interior space as possible while still getting the boat up on plane. A full displacement yacht offers the most interior space but at the cost of speed.

As the yachts get larger, there is greater room for customization. Even production boats offer some variation on interior decor and sometimes layout. As motoryachts get larger and become megayachts, there is even more customization available, from layout to hullform. A custom megayacht is designed for each owner down to the shape of the hull and then through the layout and interior decor.
Megayachts can be defined by their deckplan. A skylounge yacht has a partially enclosed flybridge to increase interior space while a raised pilothouse offers a split deck plan with the helm higher than the main deck but quite as high as the flybridge. These yachts are typically in the 120-foot range. Larger yachts tend to be tri-decks.

Expedition motoryachts are designed to travel anywhere. They traditionally have full displacement hulls to cope with any seas the yacht may encounter while far from her homeport.

Although catamarans began as sailboats, in recent years the power cat has become increasingly popular. The power catamaran offers more stability and interior volume than a traditional monohull thanks to the increased beam but the vessels often require increased dock space.

The motoryacht category is one of the most diverse in the shipbuilding industry. From 60 feet and up, it includes day cruisers all the way up to megayachts.