Referring to the generalized schematic of global circulation patterns, the band marked G is a region of generally pressure. This region is known as the Zone. Precipitation is generally (high or low) in this zone . H is a region of steady, reliable winds called the . M marks a region of prevailing pressure. The zone marked E, between about 20 to 35 degrees north, is characterized by pressure, temperatures, and air. The subpolar low pressure cells would be found in the bands marked and . The region marked J is a zone of prevailing winds called the . Two regions of hot, dry air and unreliable winds, where sailors were often becalmed, are called the horse latitudes; these are located in the zones marked and .