Garmin GTN 725 User Manual

12-11190-01007-03 Rev. C
GTN 725/750 Pilot’s Guide
Foreword
Getting
Started
Audio &
Xpdr Ctrl
Com/Nav
FPL
Direct-To
Proc
Charts
Wpt Info
Map
Traffic
Terrain
Weather
Nearest
Services/
Music
Utilities
System
Messages
Symbols
Appendix
Index
12.1.5.2 NEXRAD Limitations
NEXRAD radar images may have certain limitations:
• NEXRAD base reectivity does not provide sufficient information to
determine cloud layers or precipitation characteristics. For example, it is
not possible to distinguish between wet snow, wet hail, and rain.
• NEXRADbasereectivityissampledattheminimumantennaelevation
angle. An individual NEXRAD site cannot depict high altitude storms at
close ranges. It has no information about storms directly over the site.
• Each square block on the display represents an area of four square
kilometers (2.15 NM). The intensity level reflected by each square
represents the highest level of NEXRAD data sampled within the area.
Block Area Is 4 km
2
(2.15 NM
2
)
Block Area Is 4 km
2
(2.15 NM
2
)
Figure 12-10 NEXRAD Data Blocks
The following may cause abnormalities in displayed NEXRAD radar images:
• Groundclutter
• Strobesandspuriousradardata
• Sunstrobes(whentheradarantennapointsdirectlyatthesun)
• Interferencefrombuildingsormountains,whichmaycauseshadows
• Metallicdustfrommilitaryaircraft,whichcancausealterationsinradar
scans

Garmin GTN 725 Specifications

General

Brand	Garmin
Model	GTN 725
Category	GPS
Language	English