Garmin Fish Finders

Garmin is a well-known US-based manufacturer founded in 1989. Their legacy as a producer of numerous GPS-based electronics means they are a reliable developer of user-friendly interfaces and easy-to-master software.
Garmin Product Lines
STRIKER
STRIKER is Garmin’s core and marine fish finder line, with screen sizes ranging from 4 to 7 inches and a short feature set. The latest iteration is the STRIKER Plus series.
ECHOMAP
ECHOMAP is Garmin’s middle-tier chartplotter/sonar line, with units starting at 3 inches and ranging up to 9 inches. The latest iteration is the ECHOMAP Plus series.
GPSMAP
GPSMAP is Garmin’s premiere-end chartplotter/sonar line, ranging all the way up to yacht-size screens of over 20 inches.