Garmin 190-00336-00 Manuale Utente

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GDL 30/30A Owner’s Manual 
3
Fronts
The Fronts feature displays the lines indicating the leading edge of an air mass that is replacing another. This feature also displays pressure centers. Pressure centers are 
represented by a large Red “L” for low pressure centers or a large Blue “H” for high pressure centers. Pressure centers represent an area where pressure is measured to 
be either the highest or lowest relative to the surrounding area.
 
Indicates a Low Pressure Center. A Low 
Pressure Center is an area where the 
measured pressure is lowest relative to the 
surrounding area. Moving away from a Low 
Pressure Center in any horizontal direction 
results in increased pressure. Winds flow 
counterclockwise around Low Pressure 
Centers in North America.
Indicates a High Pressure Center. Similar 
to a Low Pressure Center, a High Pressure 
Center is an area where the measured pressure 
is highest relative to the surrounding area. 
Moving away from a High Pressure Center in 
any horizontal direction results in decreased 
pressure. Winds flow clockwise around High 
Pressure Centers in North America.
Cold Front
Warm Front
Statonary Front
Occluded Front
Dry Lne
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