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Isobars

Boating IronsJack stay

Isobars: On a weather map, lines drawn connecting places of equal atmospheric pressure; isobars close together indicate a steeper gradient of pressure and stronger winds.

 


isobars - Lines drawn on a weather map indicating regions of equal pressure. When the lines are close together, this indicates a rapid change in air pressure, accompanied by strong winds.

isobars
Bars or lines on meteorological maps to show pressure areas
isogonic lines ...

isobars - Found on a weather map, they are lines of equal atmospheric pressure.
isogonic lines - Found on a chart, they are lines of equal magnetic variation.

The difference in pressure between two points divided by the distance between them. On a weather map, the closeness of the isobars is a measure of the pressure gradient.
Pressure gradient wind ...

Impeller pump: A type of pump commonly used on large sailing vessels
Inboard: Toward the center of a boat; sometimes used for "engine"
Isobars: Bars or lines on meteorological maps to show pressure areas ...

See also: Lines, Bow, Set, Boat, Variation