Welcome to our review of the Waterproof Garmin 300C Fishfinder.  

In this write-up we will examine the Garmin 300C by looking over its features, comparing customer reviews, and providing an overall rating and recommendation.

Garmin’s Fishfinder 300C with 3.5-Inch Display and Dual-Beam Transducer is a combination fishfinder and GPS that provides the best of both worlds in one convenient package.

The Garmin 300C Portable Fishfinder with color sonar and dual-beam transducer has a lot of great features for the price.

It is especially useful for those who like to fish in the lakes but can be used elsewhere as well.

This Garmin transducer does have a somewhat smaller screen than other fishfinders, but most people are impressed by the clarity of the screen and readouts, and even is easy to read under direct sunlight.

The built-in CHIRP technology sonar gives you a clear picture of what’s below your boat, giving you an edge when it comes to finding the perfect fishing spot.

And with its preloaded LakeVu HD maps, you’ll always know where you are on the water.

Garmin Fishfinder 300C Description & Features

Looking for an affordable, freshwater lake fishfinder with a color display? The reasonably priced Fishfinder 300C color fish finder is the perfect choice for many anglers.

Observe Fish in Clear, Bright Color

The 300C possesses a mega bright, full-resolution 3.5-inch QVGA color display. Users of previous Garmin models will be impressed with improvements made to the user and graphical interface.

Staff Pick

Garmin Waterproof Fishfinder 300C

Garmin’s Fishfinder 300C with 3.5-Inch Display and Dual-Beam Transducer is a combination fishfinder.
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Get live screen updates with Ultrascroll and incredible shallow water capabilities with a dual-beam transducer.

Screen Size3.5 Inches
Item Weight3.6 Pounds

The Garmin 300C also offers top-rated sonar performance.

Garmin 300C Portable Fishfinder 300C Features

The Garmin Portable Fishfinder 300C is equipped with a high-performance sonar receiver and has a super bright, high-resolution 3.5-inch QVGA color display with an easy-to-use interface, plus UltraScroll; for screen updates at live-action speeds.

This system performs especially well in shallow water with wide coverage due to the inclusion of a dual-beam transducer.

  • Auto Gain setting automatically adjusts sonar sensitivity
  • See-Thru technology displays strong and weak returns
  • 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

Some other features of this Garmin color fishfinder include 150 watts (RMS) 1200 watts (peak to peak) power output, automatic sonar sensitivity via Auto Gain setting, simultaneous weak and strong returns via See-Thru® technology, round flasher display mode, Whiteline shows you bottom thickness, 2X, and 4X automatic and manual zoom Battery voltage indicator.

Garmin Fishfinder 300C Reviews

Sample Customer Reviews

Reviews of the Garmin 300C Fishfinder are outstanding overall with almost all reviews we’ve located being either 4 or 5 out of 5 stars.

Positive Customer Reviews

Has every features you’ll need and it’s simple to use.  Extrememly glad I bought this model. It’s great quality and doesn’t cost an arm and leg.
— L.X.

The portability of this fish finder makes for simple setup and removal. Love the screen, it’s crystal clear regardless of the weather conditions.  It’s nice not having to worry about it getting wet in rain or worse.
— J.O.

Garmin Waterproof Fishfinder 300C

  • Frequency = 80/200
  • Resolution (VxH) = 320 x 240
  • Screen Size = 3.5″
  • Speed/Temp = Temp Only
  • Watts RMS – Max = 150
4.6/5 - (23 votes)

Welcome to FishFinder Review. Here at we will be examining a variety of popular fish finders, depth finders, GPS, and chartplotters.

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