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Garmin FishFinder 300C

Discontinued. Replaced by the Garmin echo 300c >>

The affordable Fishfinder 300C color sounder is just right for recreational anglers who fish primarily in freshwater lakes.

See Fish in Bright Color

The 300C has a super bright, high resolution 3.5-inch QVGA color display with improved user interface, plus UltraScroll™ for screen updates at live-action speeds. The 300C comes with a dual beam transducer, which provides excellent coverage in shallow waters.

Benefit from High Performance Sonar

The 300C features the high performance sonar receiver found in most of the Garmin marine lineup.

Other features:
• Power output: 150 watts (RMS) 1200 watts (peak to peak)
Auto Gain setting adjusts sonar sensitivity automatically
See-Thru® technology shows weak and strong returns simultaneously
Round flasher display mode
Whiteline shows you how thick the bottom is
• 2X and 4X automatic and manual zoom
• Battery voltage indicator
• Single NMEA-0183 output

Physical & Performance:

Unit dimensions, WxHxD: 4.5" x 4.5" x 2.4" (11.4 x 11.4 x 6.1 cm)
Display size, WxH: 2.1" x 2.8", 3.5" diagonal (5.3 x 7.1 cm, 8.9 cm diagonal)
Display resolution, WxH: 240 x 320 pixels
Display type: QVGA
Weight: 9.6 oz (272 g)
Waterproof: yes (IPX7)


CANet® compatible: no
Audible alarms: yes
Dual-frequency sonar capable: no
Dual-beam sonar capable : yes
Split-screen zoom: yes
Ultrascroll™ (displays fish targets at higher boat speeds): yes
See-thru® technology (exposes fish hidden in cover): yes
Fish Symbol ID (helps identify fish targets): yes
AutoGain Technology (minimizes clutter, maximizes targets): yes
Whiteline (indicates hard or soft bottom): yes
Adjustable depth line (measures depth of underwater objects): yes
A-scope (real time display of fish passing through transducer beam): no
Bottom lock (shows return from the bottom up): yes
Water temperature log and graph: yes
Water temperature sensor included: yes
Water speed capable (displays speed on water): yes


Frequency: 80/200 kHz (dual beam)
Transmit power: Dual Beam, 150 W (RMS), 1,200 Watts (peak to peak)
Voltage range: 10-20 VDC
Maximum depth: 900 ft (dual beam)
Cone angle: 45° or 15° (dual beam)
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fishfinder 340c accessories
user's manual

Garmin Fishfinder 300C
Package Includes:
• Fishfinder 300C
• Transom/trolling mount transducer (dual beam)
• 6ft. Power/data cable
• Flush mount hardware
• Quick start manual

The advantage of colour is clear on this screen. Schools of fish appear in and around the stumps of a reservoir. Colour fishfinders give you the ability to see the intensity of returns. The hard bottom is red, as are the solid sonar returns of fish and bait fish. Less dense objects, such as weeds or mud, show up blue or green. This makes it easier to determine the bottom consistency.

See: Quick Start Manual (300C)

About: Fishfinders


Garmin Fishfinder 300C

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