There has also been a growing trend to operate ships in increasingly exotic locations - polar waters or remote tropical areas, for example.
The trimaran, a relatively frail thing that was never designed for polar waters, let alone sea battles, reportedly cost more than a million dollars.
Most Antarctic predators are found in the polar waters, including the orca and the leopard seal.
If things got too hot, the cold polar waters would cool them off.
Common bottlenose dolphins are widespread, except in polar waters.
It is typical of the 20 trawlers illegally fishing remote polar waters.
So less light can penetrate into water and becomes bio available to the plants in polar water under the ice cover.
Salt makes water more polar, but relatively few stains need an improvement in water's strong suit.
It avoids polar and tropical waters and semi-enclosed bodies of water.
The first boats to be used in the polar waters were those of the indigenous Arctic people.