(nautical, physics) The vertical distance between the metacentre and center of mass (conventionally taken to be positive when the metacentre is above the center of mass, and negative when the center of mass is above the metacentre) of a vessel (such as a ship or a boat) when the vessel is upright with zero bank angle; measures the vessel's tendency to resist being rolled from the upright orientation; must be positive in order for the vessel to have positive static stability.

plural of line-height

acrophobia

A municipality of St. Louis County, Missouri, United States.

(oceanographics, nautical) A standardized measure of trough-to-crest wave height calculated for the needs of seafarers; exact mathematical definition has varied over time and currently it is defined as four times the standard deviation of the surface elevation.

plural of significant wave height

A census-designated place in Contra Costa County, California, United States.

A census-designated place in San Bernardino County, California, United States.

A city in Los Angeles County, California, United States.

(radio) The height of a radio transmitter, including the antenna, as compared to the average terrain height in the surrounding area between three and sixteen kilometers from the antenna site.