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
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.