Water is an extraordinary substance. For such a small molecule, it has an extraordinarily high melting and boiling point. And its peculiarity is to be explained by hydrogen , which acts as a potent intermolecular force.
The most extraordinary property with regard to liquid water is that water as a LIQUID is more DENSE than water as a SOLID, whereas most solids are DENSER than their liquid phases. Hence ice cubes float......on top of your cocktail, or on top of the ocean. And thus we choose
What hazard does this property pose to passenger liners?