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Internal, Worldwide Basemap, Garmin, 320 X 240
GPSMAP 421 Chartplotter
GPSMAP 521 Chartplotter, 5"
GPSMAP 421s Chartplotter/Sounder with No Transducer
GPSMAP 521s Chartplotter with No Transducer
GPSMAP 521s Chartplotter with Dual-frequency Transducer
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Category
Chartplotters
(2)
Fishfinder & GPS Combos
(3)
Brand
Garmin
(5)
Accepts Data Cards
Yes
(2)
Antenna
Internal
(5)
Application
Marine Navigation
(2)
Battery Type
No Battery
(2)
Cartography
Worldwide Basemap
(5)
Dimensions
5.9"W x 6.4"H x 2.9"D
(3)
5.7"W x 5.0"H x 2.7"D
(2)
Display Resolution
320 x 240
(5)
Frequency
50/200kHz (dual frequency), 80/200kHz (dual beam)
(3)