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Humminbird 788C
Garmin GPSMAP 536
Garmin GPSMAP 546
Garmin GPSMAP 531
Raymarine A50D
Humminbird 788C Gps Combo GPS Receiver
Garmin GPSMAP 536 GPS Receiver
Garmin GPSMAP 546s GPS Receiver
Garmin GPSMAP 531 GPS Receiver
Raymarine A50D GPS Receiver
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Release Date
Aug 2009
Jul 2009
Jul 2009
Jul 2009
Jan 2009
Map capabilities
Internal
Internal, Map cartridges / Data cards
Map cartridges / Data cards
Map cartridges / Data cards
Receiver type
16 Channels
20 Channels
12 Channels
14 Channels
12 Channels
Designation
Marine
Marine
Marine
Marine
Marine
Enhanced accuracy
WAAS enabled, EGNOS enabled, MSAS enabled
WAAS enabled
WAAS enabled
WAAS enabled
Form Factor
Fixed
Fixed
Fixed
Fixed
Fixed
Input Method
Keypad
Touch Screen
Keypad
Keypad
Touch Screen
Screen Size
5.0 inch
5.0 inch
5.0 inch
5.0 inch
5.0 inch
User interface
Touch Screen
Touch Screen
Touch Screen
Average Rating
 n stars
 n stars
 n stars
 n stars
 n stars
Display
100% Positive
100% Positive
66% Positive
34% Negative
Usability
100% Positive
100% Positive